Major Towns and Cities in the Regional Office area:

Ascot, Burnham, Camden, Chiswick, Ealing, Eastcote, Edgware, Eton, Gerrards Cross, Greenford, Hammersmith, Hampstead, Harlesden, Harpenden, Harrow, Hayes, Hendon, Holburn, Iver, Kensington, Langley, Maidenhead, Marlow, Marylebone, Paddington, Pinner, Redbourne, Ruislip, St. Albans, Shenley, Slough, Southall, Sunningdale, Uxbridge, Wembley, West Drayton, Willesden and Windsor.