Buckinghamshire:

Aylesbury, Beaconsfield, Bletchley, Bourne End, Buckingham, Burnham, Chalfont, Chesham, Denham, Flackwell Heath, Gerrards Cross, Great Missenden, High Wycombe, Holmer Green, Lavendon, Long Crendon, Marlow, Milton Keynes, Princes Risborough, Richings Park, Seer Green, Steeple Claydon, Stoke Poges, and Stokenchurch

​

Berkshire:

Slough, Reading, Bracknell, Ascot, Windsor, Maidenhead, Caversham, Cookham, Crowthorne, Dorney, Eton, Maidenhead, Newbury, Reading, Riseley, Sandhurst, Thatcham, Twyford, Wokingham, and Woodley
 

Middlesex/London

Brentford, Eastcote, Edgware, Enfield, Feltham, Hanworth, Harefield, Harrow, Hayes, Hounslow, Isleworth, Northwood, Perivale, Ruislip, Ruislip Manor, Southall, Twickenham, Uxbridge, Wembley, and West Drayton

​