UK Butterfly Site Guide
Abingdon (NE), Oxon (SU508988 VC22)
Species seen here:

Abingdon, Oxon (SU516967 VC22)
Woodland and scrub on the banks of the Thames. Species seen here:

Afton Down, Isle of Wight (SZ366855 VC10 Web)
Steep chalk grassland overlooking Compton Bay in the south-west of the Isle of Wight. Owned by the National Trust. Species seen here:

Allithwaite Quarry, Cumbria (SD390767 VC69)
A disused quarry. Owned by Lower Allithwaite Council. Species seen here:

Allotment, Abingdon, Oxon (SU489988 VC22)
Allotment gardens 2 miles NE of Abingdon. Although mostly cultivated, the edges of the site are wildflower-rich. No public access. Species seen here:

Ardley Quarry, Oxon (SP537273 VC23 Web)
A disused quarry with scrub, woodland and rough grassland. Owned by Viridor and managed by BBOWT. Species seen here:

Arne, Dorset (SY975882 VC9 Web)
A large area of open heathland and old oak woodland. An RSPB reserve. Species seen here:

Arnside Knott, Cumbria (SD451769 VC69 Web)
Arnside Knott is covered with limestone grassland and mixed woodland, which attracts a variety of insects and is especially renowned for butterflies. Habitats are limestone grassland, woodland, wet meadow, scree and scrub. Owned by the National Trust. Species seen here:

Ashford Hill NNR, Hants (SU559621 VC12 Web)
This area is maintained as it would originally have been, as rough grazing within the floodplain. Owned by Natural England. Species seen here:

Aston Rowant NNR, Oxon (SU722961 VC23 Web)
Two areas of chalk downland with some woodland on the edge of the Chilterns, one each side of the M40 motorway cutting. Car park for Beacon Hill (north side) at SU732966 and for Bald Hill (south side) at SU727958, both signposted off the unclassified road to Christmas Common from the A40 west of Stokenchurch. Two miles W of Stokenchurch. Managed by Natural England. Species seen here:

Aston Upthorpe Downs, Oxon (SU550844 VC22 Web)
Aston Upthorpe Downs is a chalk downland site with open access land. There's a sign with a map at the entrance to Juniper Valley. Park by the grain dryer at SU550844 on unclassified road off the A417 south of Aston Upthorpe village. The site was designated a SSSI in 1953 and is now within the North Wessex Downs AONB. 3½ miles SE of Didcot. Species seen here:

Bagley Wood, Oxon (SP513015 VC22)
Mixed woodland, part of which is a commercial forestry. 3 miles SW of Oxford. Owned by St John's College (permit required). Species seen here:

Barnwell Country Park, Northants (TL034870 VC32 Web)
The park comprises 37 acres of lakes, riverbank and meadows in the flood plain of the river Nene. Northants County Council. Species seen here:

Barton Fields, Abingdon, Oxon (SU511971 VC22 Web)
An area of reedbeds and wet woodland adjacent to the Thames. Managed by Abingdon Naturalists Society. Species seen here:

Bayworth, Oxon (SP500014 VC22)
Roadsides and footpaths. Species seen here:

Bempton Cliffs, E. Yorks (TA197738 VC61 Web)
This site features towering sea cliffs chich are home to thousands of seabirds. The grassland on the cliff tops is home to terrestrial birds and insects. 4 miles N of Bridlington. An RSPB reserve Species seen here:

Bentley Wood, Wilts (SU258292 VC8 Web)
A large mixed woodland on the Wilts/Hants border. More than 35 butterfly species are recorded there regularly, including every woodland species resident in southern England. There are also some small ponds which attract Odonata including the Downy Emerald. Managed by the Bentley Wood Charitable Trust. Species seen here:

Bernwood Forest, Bucks (SP611116 VC24 Web)
Ancient woodland. Incorporates Oakley, Shabbington and York's Woods and Hell Coppice. Car park at SP610116 off the unclassified road from Oakley to Stanton St John. Seven miles NE of Oxford. Managed by the Forestry Commission. Species seen here:

Bernwood Meadows, Bucks (SP606111 VC24 Web)
Two wild flower meadows adjacent to Bernwood Forest. Very small car park at SP606111 off the unclassified road from Oakley to Stanton St John. 7 miles NE of Oxford. A BBOWT reserve. Species seen here:

Besselsleigh Wood, Oxon (SP448017 VC22)
A mixed woodland. Species seen here:

Bowdown Wood, Berks (SU501652 VC22 Web)
A large area of ancient woodland stretching from the heathland at Greenham Common down to the River Kennet. Half a mile south of Thatcham. A BBOWT reserve. Species seen here:

Bryher, Isles of Scilly (SV874148 VC1 Web)
One of the Scilly islands, Bryher has a rocky coastline and small cultivated fields which are bordered by hedges. Probably the most unspoilt Scilly island. Part of the Duchy of Cornwall estate. Species seen here:

Bucknell Wood, Northants (SP660451 VC32)
A Forestry Commission wood. Species seen here:

Burgess Field, Oxon (SP497084 VC23)
A reclaimed rubbish dump on the edge of Port Meadow. It features scrub land and specially planted hedgerows. Managed by Oxford City Council. Species seen here:

Calvert Jubilee, Oxon (SP682251 VC24 Web)
A reclaimed clay pit. A BBOWT reserve. Species seen here:

Catfield Fen, Norfolk (TG370212 VC27 Web)
The reserve is a typical fen mixture of open water, reed, sedge and carr woodland. The reed is cut on a 1-2 year cycle, and sedge on a 3-5 year cycle. A Butterfly Conservation site. Species seen here:

Challan Hall, Lancashire (SD474765 VC60)
Garden on the edge of Gait Barrows NNR overlooking Hawes Water. Privately owned. Species seen here:

Charndon, Bucks (SP673251 VC24)
Species seen here:

Chazey Heath, Oxon (SU695771 VC23)
A line of Elm trees behind the Pack Saddle pub. Species seen here:

Cheyne Weare, Portland, Dorset (SY689706 VC9)
Species seen here:

Chimney Meadows, Oxon (SP364013 VC23 Web)
Chimney Meadows is the Berks, Bucks & Oxon Wildlife Trust's largest nature reserve and its fields are part of an ancient landscape, created by the Thames and shaped by centuries of farming. Nine miles west of Oxford. A BBOWT reserve. Species seen here:

Cholsey Marsh, Oxon (SU601855 VC22 Web)
A marsh adjacent to the River Thames. Managed by BBOWT. Species seen here:

Choseley Barns, Norfolk (TF757420 VC28)
Species seen here:

Churn, Oxon (SU509832 VC22 Web)
Chalk downland. A disused railway line, a former rifle range, open gallops and several wide grassy trackways with unkempt hedges provide habitat for a good range of downland specialities. This location is within the North Wessex Downs AONB. About 5 miles S of Didcot. Species seen here:

Collard Hill, Somerset (ST488340 VC6 Web)
Chalk grassland which has been carefully managed for the Large Blue. Three miles S of Glastonbury. Owned by the National Trust. Species seen here:

Compton Chine, Isle of Wight (SZ368851 VC10 Web)
An area of low cliffs which collapse into the sea regularly, providing habitat for the Glanville Fritillary. Owned by the National Trust. Species seen here:

Cors y Llyn NNR, Powys (SO106553 VC43 Web)
A mire. The bogs and open water at the centre of the reserve are enclosed by a band of trees, which are surrounded by an area of pasture. Managed by Natural Resources Wales. Species seen here:

Cothill Fen, Oxon (SU459996 VC22 Web)
Cothill NNR is part of the much larger Cothill Fen Special Area of Conservation (SAC), one of the most species-rich lowland calcareous fen systems in the UK. Three miles NE of Abingdon. Managed by Natural England. Species seen here:

Cotley Hill, Wilts (ST915437 VC8)
Chalk grassland on the western edge of Salisbury Plain. It is an SSSI. Species seen here:

Crockford Stream, Hants (SZ350990 VC11 Web)
A typical example of the New Forest heathland habitat, comprising a large expanse of open heath with areas of scrub and woodland edges. Managed by the Forestry Commission. Species seen here:

Crookham Common, Berks (SU520646 VC22 Web)
Lowland heath. Managed by BBOWT. Species seen here:

Crowle Moor, N. Lincs (SE745150 VC63 Web)
One of the richest lowland peat vegetation areas in the north of England. A Lincolnshire Wildlife Trust reserve. Species seen here:

Danebury Hill, Hants (SU325375 VC12 Web)
This is the site of an Iron Age hill fort. The surrounding grassland and scrub have never been intensively farmed. A Hampshire County Council site. Species seen here:

Daneway Banks, Gloucs (SO937034 VC33 Web)
The Oolitic limestone grassland on the upper slopes of this SSSI is the most important habitat of this site, although scrub, woodland and neutral grassland add to the diversity. A Gloucestershire Wildlife Trust site. Species seen here:

Decoy Heath, Berks (SU612634 VC22 Web)
Decoy Heath consists of bogland, heathland and woodland. A BBOWT reserve. Species seen here:

Dersingham Bog, Norfolk (TF664285 VC28 Web)
The reserve lies between the town of Dersingham and the village of Wolferton, two km west of Sandringham. The A149 forms the site's eastern boundary, and a disused railway line between Dersingham and Wolferton marks the reserve's western boundary. Acid valley mire is found over much of the low-lying parts of the reserve where the ground is waterlogged for most of the year. There are also areas of heath and woodland. Managed by Natural England. Species seen here:

Dry Sandford Pit, Oxon (SU467997 VC22 Web)
A mosaic of fossil-rich cliffs, fenland with ponds and streams, grassland, scrub and woodland set in an old quarry. 2½ miles north-west of Abingdon. A BBOWT reserve. Species seen here:

Dunkery Hill, Somerset (SS907407 VC5 Web)
Owned by the National Trust. Species seen here:

Durlston NNR, Dorset (SU258292 VC9 Web)
This 280 acre site in south Dorset comprises sea-cliffs, coastal limestone downland, haymeadows, hedgerows and woodland. Managed by Natural England. Species seen here:

Eskdale, Cumbria (NY175008 VC70)
Species seen here:

Eynsham, Oxon (SP441087 VC23 Web)
The main habitat is the River Thames and its flood plain. Species seen here:

Farmoor Reservoir, Oxon (SP440065 VC22 Web)
Two large reservoirs near the Thames to the west of Oxford. Several areas of wetland have been established between the reservoirs and the river. Five miles W of Oxford. A Thames Water site. Species seen here:

Fence Wood, Berks (SU507716 VC22)
A mixed woodland with wide rides. Parking off Slanting Hill at SU507716. Owned by the Eling Estate. Species seen here:

Fermyn Wood, Northants (SP968849 VC32 Web)
Ancient woodlands containing semi-natural oak and ash woods, along with conifer plantations. Forestry Commission. Species seen here:

Finemere Wood, Bucks (SP717217 VC24 Web)
A mixture of broadleaved woodland, patches of scrub with paths and wild rides, with a meadow, ponds and streams. A BBOWT reserve. Species seen here:

Folly Park, Faringdon, Oxon (SU294949 VC23 Web)
Public park with pond and wild flower meadow. Managed by Vale of White Horse District Council. Species seen here:

Foulshaw Moss, Cumbria (SD458837 VC69 Web)
A restored peat bog. A Cumbria Wildlife Trust reserve. Species seen here:

Gait Barrows NNR, Lancashire (SD479771 VC60 Web)
Gait Barrows NNR is a rich mosaic of limestone habitats including unique limestone pavement, yew woodland, fen and reedbed. Owned by Natural England. Species seen here:

Gilfach Farm, Powys (SN951713 VC43 Web)
A hill farm of open moorland, flower-rich grassland and oak woodland sitting in the Marteg Valley. Managed by Radnorshire Wildlife Trust. Species seen here:

Goring Railway Bridge, Oxon (SU606795 VC23)
This is an area of riverbank where the railway bridge crosses the River Thames about 1 mile south of Goring. The bridgework is a good place to see Common Clubtails emerge. The river is managed by Thames Water. Species seen here:

Greenham Common, Berks (SU501652 VC22 Web)
Greenham and Crookham Common on the southern edge of Newbury forms the largest area of lowland heath in West Berkshire. The site is owned by West Berks Council. Species seen here:

Hackpen Hill, Oxon (SU352849 VC22)
Unimproved chalk grassland on the Ridgeway, 4 miles SW of Wantage. It is a designated SSSI. Privately owned. Species seen here:

Haddon Hill, Somerset (SS979285 VC5)
Owned by the National Trust. Species seen here:

Haddon Moor, Somerset (SS996290 VC5 Web)
An example of wet, heathy grassland dominated by Purple Moor-grass. A Butterfly Conservation reserve. Species seen here:

Hartslock, Oxon (SU615794 VC23 Web)
An area of steep chalk downland overlooking the River Thames. Park at Goring station or Goring and follow the Thames Path to the reserve. A BBOWT site. Species seen here:

Heddon Valley, Devon (SS654488 VC4)
Owned by the National Trust. Species seen here:

Hickling Broad, Norfolk (TG428222 VC27 Web)
Hickling Broad is situated in the upper stretches of the River Thurne, and is the largest expanse of open water in the Broads. A Norfolk Wildlife Trust reserve. Species seen here:

Highmoor, Oxon (SU701852 VC23)
Mixed woodland in the Chilterns. Species seen here:

Hinksey Lake, Oxford, Oxon (SP513047 VC22 Web)
A shallow lake which has been designated as a Site of Local Importance for Nature Conservation. This site is managed by Oxford City Council. Species seen here:

Hitchcopse South Sandpit, Oxon (SU458993 VC22 Web)
A disused sand pit which is a Local Wildlife Site. Formerly called Cothill Pitt. Privately owned. Species seen here:

Holkham NNR, Norfolk (TF901456 VC28 Web)
Four thousand hectares of saltmarsh, grazing marsh, dunes, reedbeds, mudflats, sandy beach and pinewoods. Managed by Natural England. Species seen here:

Homefield Wood, Bucks (SU812868 VC24 Web)
A warm Chilterns slope, with woodland and grassland. The wild flowers that grow here attract butterflies such as the marbled white, white-letter hairstreak and the silver-washed fritillary. A variety of bees also find nectar in the flowers, and over 400 species of moth have been recorded, including Blotched Emerald and Striped Lychnis. Owned by Forest Enterprise and managed by BBOWT. Species seen here:

Horton-cum-Studley, Oxon (SP600122 VC23)
Private garden Species seen here:

Hyde Hall, Essex (TQ781995 VC18 Web)
A 360 acre site, part of which is a cultivated garden. A Royal Horticultural Society garden. Species seen here:

Irton Fell, Cumbria (NY134023 VC70)
Species seen here:

Irton Pike, Cumbria (NY121014 VC70)
Species seen here:

Ivinghoe Beacon, Bucks (SP961168 VC24)
A large area of chalk downland. Owned by the National Trust. Species seen here:

Kelling Heath, Norfolk (TG098413 VC28 Web)
This SSSI is described by Natural England as 'dwarf scrub heath - lowland' and covers 90 hectares. Lowland heath is a rare and declining habitat, and is very rich in specialised wildlife. The vegetation is largely open heathland comprising common gorse, western gorse, heather, bell heather and bracken. The site is managed by two bodies of Trustees. Species seen here:

Kew Gardens, Surrey (TQ182767 VC17 Web)
Extensive area of parkland, lakes and ornamental gardens. Managed by the RHS. Species seen here:

Kiplingcotes Chalk Pit, E. Yorks (SE916435 VC61 Web)
A rich variety of chalk flora and spectacular butterflies are found on this disused chalk quarry in the Yorkshire Wolds. Seven miles NW of Beverley. A Yorkshire Wildlife Trust reserve. Species seen here:

Lardon Chase, Berks (SU586809 VC22 Web)
An area of steep chalk downland overlooking the River Thames on the western side of Streatley. Car park at SU583807 off the B4009. 1 mile W of Goring. Owned by the National Trust. Species seen here:

Latterbarrow, Cumbria (SD439829 VC69 Web)
This reserve has a mix of grassland, woodland and scrub. It is a haven for insect life. A Cumbria Wildlife Trust reserve. Species seen here:

Leighton Moss, Lancashire (SD478750 VC60 Web)
Leighton Moss is the largest reedbed in north-west England. An RSPB reserve. Species seen here:

Lid's Down, Oxon (SU550852 VC22)
Species seen here:

Lodmoor, Dorset (SY687813 VC9 Web)
Lodmoor is composed of reed bed, salt marsh, wet grassland and open water. It is a SSSI. An RSPB reserve. Species seen here:

Lollingdon Hill, Oxon (SU569850 VC22 Web)
Species seen here:

Lymington-Keyhaven NR, Hants (SZ309919 VC11 Web)
The reserve covers nearly 500 acres between the mouth of the Lymington river and the village of Keyhaven. The adjacent mudflats and salt marshes outside the seawall are leased by Hampshire and Isle of Wight Wildlife Trust and form their Keyhaven and Pennington Marshes Reserve. Managed by Hampshire County Council. Species seen here:

Marston Meadows, Oxon (SP519076 VC23)
Wet meadows in the flood plain of the River Cherwell. Species seen here:

Meathop Moss, Cumbria (SD442819 VC69 Web)
A raised mire. A Cumbria Wildlife Trust reserve. Species seen here:

Myers Allotment, Lancashire (SD474749 VC60 Web)
The site is largely covered with scrub and secondary woodland, with areas of exposed limestone pavement. Owned by Leighton Hall estate and managed by Butterfly Conservation. Species seen here:

Narborough Railway Line, Norfolk (TF751115 VC28 Web)
An unusual area of chalk grassland which supports locally scarce species of flora and fauna. Twelve miles SE of King's Lynn. A Norfolk Wildlife Trust reserve. Species seen here:

New Copse Inclosure, Hants (SU331030 VC11)
A typical New Forest inclosure. A Forestry Commission wood. Species seen here:

Newtown Harbour NNR, Isle of Wight (SZ423912 VC10 Web)
The reserve is on the northern coast of the Isle of Wight and comprises areas of estuary and foreshore with extensive mudflats and saltmarsh, together with adjacent meadows and woodland. Owned by the National Trust. Species seen here:

North Cave Wetlands, E. Yorkshire (SE882330 VC61 Web)
A mixture of shallow and deep water lakes and reedbeds created from former sand and gravel pits. A Yorkshire Wildlife Trust site. Species seen here:

Otmoor, Oxon (SP569126 VC23 Web)
A large area of wet meadows and reedbeds. Park at the bottom of Otmoor Lane at SP569126. Seven miles NE of Oxford. An RSPB reserve. Species seen here:

Paices's Wood, Berks (SU587638 VC22 Web)
This 35 hectare (86.5 acre) former gravel extraction site consists of extensive woodland, grassland and several lakes located in a narrow valley just outside Aldermaston. Privately owned and managed in agreement with West Berks council. Species seen here:

Parsonage Moor, Oxon (SU460997 VC22 Web)
An area of calcareous fen adjacent to Cothill Fen. Three miles NE of Abingdon. A BBOWT reserve. Species seen here:

Pewsey Downs NNR, Wilts (SU113635 VC7 Web)
The reserve lies on the southern edge of the Marlborough Downs and is situated on a steep, south-facing scarp slope overlooking the Vale of Pewsey and set within the North Wessex Downs Area of Outstanding Natural Beauty. Managed by Natural England. Species seen here:

Piddington Wood, Oxon (SP629164 VC23 Web)
An area of mixed woodland with an adjacent meadow. No car park as such, but there is a small lay-by on the B4011 at SP631164 right beside the entrance. 4 miles SE of Bicester. A Woodland Trust reserve. Species seen here:

Pitstone, Bucks (SP942146 VC24)
A disused chalk pit. Species seen here:

Port Meadow, Oxford, Oxon (SP498078 VC23 Web)
A large expanse of Thames floodplain. Oxford City Council. Species seen here:

Portland Bill, Dorset (SY677687 VC9 Web)
Species seen here:

Radipole Lake, Dorset (SY674798 VC9 Web)
A large wetland with extensive reed beds. An RSPB reserve. Species seen here:

Radley Lakes, Oxon (SU519975 VC22 Web)
Thrupp, Bullfield and Orchard Lakes are flooded former gravel pit which are home to a wide variety of wildlife, including butterflies and dragonflies. Thrupp Lake is managed by the Earth Trust. Species seen here:

Redbridge, Oxon (SP519037 VC22)
Hinksey Stream flows along the western side of the car park. This site also features hedgerows and a number of mature trees. This site is owned by Oxford City Council. Species seen here:

Rodborough Common, Glos (SO849038 VC34 Web)
The site covers a large swathe of open grassland on the hill top and slopes of the Cotswold escarpment. Owned by the National Trust. Species seen here:

Rushy Common, Oxon (SP381073 VC23 Web)
Part of the Lower Windrush Valley Project. The Lower Windrush Valley covers 28 square kilometres of West Oxfordshire, incorporating the floodplain of the River Windrush from Witney to where it joins the River Thames at Newbridge. This site is owned by Oxfordshire County Council. Species seen here:

Salden railway cutting (SP820310 VC24)
The cutting of a disused railway line. Species seen here:

Salthouse, Norfolk (TG078443 VC28 Web)
This area of dune slacks, heath and marshland is a birder's paradise. A shingle bank protects it from the ravages of the North Sea. An NT site which is managed by the Norfolk Wildlife Trust. Species seen here:

Sandford Brake, Oxon (SP560019 VC23)
Scrub and woodland surrounding an electrity sub-station. Species seen here:

Seven Barrows, Berks (SU330828 VC22 Web)
An area of chalk downland, including a number of prehistoric burial mounds. Car park at SU329827 off the unclassified road between Lambourn and Kingston Lyle. 2½ miles N of Lambourn. A BBOWT reserve. Species seen here:

Silchester Common, Hants (SU621621 VC12)
Lowland heath. Species seen here:

Smardale Gill NNR, Cumbria (NY728072 VC69 Web)
The reserve occupies a 3.5 mile section of disused railway line which once ran from Tebay to Darlington. At the northern end, it includes the steep wooded slopes of the gill carved by Scandal Beck, whilst south of Smardale Gill Viaduct the character of the nature reserve changes to open rolling countryside. A Cumbria Wildlife Trust reserve. Species seen here:

Sole Common Pond, Berks (SU411706 VC22 Web)
A pond rich in wildlife with areas of bog, heath and woodland in the middle of a piece of ancient Berkshire common. A BBOWT reserve. Species seen here:

St Giles' Churchyard, Oxford (SP511069 VC23)
Churchyard with yew trees, which are popular with berry-eating birds. This site is owned by the Church of England. Species seen here:

St Mary's, Isles of Scilly (SV913108 VC1 Web)
The largest of the Scilly islands. It has a rocky coast and small cultivated fields bordered by hedges. Part of the Duchy of Cornwall estate. Species seen here:

Standlake Common, Oxon (SP385020 VC23 Web)
Flooded former gravel pits in the lower Windrush valley. Species seen here:

Stoborough Heath NNR, Dorset (SY938855 VC9)
Lowland heath, made up of dry heath, mire and acid grassland reverting to heath Owned by Natural England. Species seen here:

Stockbridge Down, Hants (SU385343 VC11 Web)
An area of chalk downland, with some scrub and woodland. Owned by the National Trust. Species seen here:

Stratfield Brake, Oxon (SP494119 VC23 Web)
A mix of old and new woodland, wetland and grassland. Owned by Oxfordshire County Council and managed by the Woodland Trust. Species seen here:

Sydlings Copse, Oxon (SP553094 VC23 Web)
An area of deciduous woodland with some heath. No car park. Access via bridleway that leaves the B4027 at SP563102, between Stanton St John and Islip. 3½ miles NE of Oxford. A BBOWT reserve. Species seen here:

The Holies, Berks (SU589802 VC22)
Chalk grassland. Owned by the National Trust. Species seen here:

The Ridgeway, Berks (SU470843 VC22)
Chalk grassland. Species seen here:

Titchwell Marsh, Norfolk (TF752443 VC28 Web)
An area of reedbeds and shallow lagoons leading to the coast. An RSPB reserve. Species seen here:

Tophill Low, E. Yorks (TA075485 VC61 Web)
Tophill Low Nature Reserve is an active Yorkshire Water Treatment Works built in 1959. It formally opened as a Nature Reserve in 1993 and features 12 hides spread across a 300 acre site that flanks the River Hull. Two reservoirs dominate the reserve but there are also areas of marshes, ponds, woodland and grassland. A Yorkshire Water site. Species seen here:

Tresco, Isles of Scilly (SV892142 VC1 Web)
One of the Scilly islands, St Agnes has a rocky coastline and small cultivated fields bordered by hedges. Probably the most developed island other than St Mary's. Part of the Duchy of Cornwall estate. Species seen here:

University Parks, Oxford, Oxon (SP515072 VC23 Web)
A large area of parkland, ornamental gardens and river banks. Managed by Oxford University. Species seen here:

Warburg Reserve, Oxon (SU717879 VC23 Web)
An area of deciduous woodland in the Chilterns with some small areas of chalk grassland. Car park at SU721879 off unclassified road from Bix Bottom. Four miles NW of Henley. A BBOWT reserve. Species seen here:

Wasdale, Cumbria (NY173072 VC70)
Species seen here:

Waterperry Wood, Oxon (SP606094 VC23)
Forestry Commission. Species seen here:

Watersmeet, Devon (SS740477 VC4)
Species seen here:

Watlington Hill, Oxon (SU702936 VC23 Web)
A mosaic of short rabbit turf, scrub and dense yew woodland. Car park at SU710935 off road between Watlington and Christmas Common. Two miles E of Watlington. Owned by the National Trust. Species seen here:

Wayford Bridge, Norfolk (TG348249 VC27)
Banks of the River Ant. Species seen here:

Weybourne, Norfolk (TG110426 VC28)
A wetland area which is protected from the North Sea by a shingle bank. Species seen here:

Whelford Pools, Glos (SU175995 VC33 Web)
Part of the Cotswold Water Park. Two miles SE of Fairford. A Gloucester Wildlife Trust reserve. Species seen here:

Whitecross Green Wood, Oxon (SP599149 VC23 Web)
An area of mixed woodland with some wide rides. Parking at SP600150 (gated track to car park). Five miles south of Bicester. A BBOWT reserve. Species seen here:

Wicken Wood, Bucks (SP730412 VC24)
An ancient woodland site on the Bucks/Northants border. It was once part of the much larger Whittlewood Forest. Species seen here:

Wootton Copse, Hants (SZ248995 VC11 Web)
The inclosure consists largely of mature mixed woodland with open rides and damp meadow along the northern edge, close to the course of Avon Water. Both the rides and meadows are well stocked with nectar sources which attract butterflies. Managed by the Forestry Commission. Species seen here:

Yeosden Bank, Bucks (SU788979 VC24)
An area of chalk grassland. Privately owned with permitted public access. Species seen here: