RES cover the South of England including the counties of Middlesex, Essex, Kent, East Sussex, West Sussex, Surrey, Hampshire, Dorset, Wiltshire, Gloucestershire, Berkshire, Oxfordshire, Buckinghamshire, Hertfordshire including London, Brighton, Portsmouth, Southampton, Winchester, Bristol, and the surrounding towns of Aldershot, Basingstoke, Beaconsfield, Bracknell, Cirencester, Egham, Farnham, Guildford, Henley on Thames, High Wycombe, Maidenhead, Marlow, Newbury, Oxford, Poole, Reading, Slough, St Albans, Staines, Swindon, Watford, Windsor, Woking, Wokingham and Worthing.

In Berkshire we cover Ascot, Bracknell, Crowthorne, Earley, Eton, Hungerford, Maidenhead, Newbury, Reading, Sandhurst, Slough, Thatcham, Windsor, Wokingham,
Brightwalton, Brimpton, Bucklebury, Burghfield, Catmore, Chaddleworth, Chieveley, Cold Ash, Combe, Compton, East Garston, East Ilsley, Enborne, Englefield, Fawley, Frilsham, Great Shefford, Greenham, Hampstead Norreys, Hamstead Marshall, Hermitage, Holybrook, Hungerford, Inkpen, Kintbury, Lambourn, Leckhampstead, Midgham, Newbury, Padworth, Pangbourne, Peasemore, Purley on Thames, Shaw-cum-Donnington, Speen, Stanford Dingley, Stratfield Mortimer, Streatley, Sulham, Sulhamstead,  Thatcham, Theale, Tidmarsh, Tilehurst, Ufton Nervet, Wasing, Welford, West Ilsley, West Woodhay, Winterbourne, Wokefield, Woolhampton, Yattendon, Windsor and Maidenhead, Bisham, Bray, Cookham, Cox Green, Datchet, Horton, Hurley, Old Windsor, Shottesbrooke Sunningdale, Sunninghill and Ascot, Waltham St. Lawrence, White Waltham, Wraysbury, Wokingham, Arborfield and Newland, Barkham, Charvil, Earley, Finchampstead, Remenham, Ruscombe, Shinfield, Sonning, St. Nicholas, Hurst, Swallowfield, Twyford, Wargrave, Winnersh, Wokingham Without, Wokingham, Woodley