Service areas:

Harrow on the Hill, Harrow, North Harrow, Northwick Park, Wembley, South Harrow, Rayners Lane, Wealdstone, Harrow Weald, Kenton, Queensbury, Belmont, Wembley Park, Preston, Tokyngton, Alperton, Sudbury, Sudbury Hill, North Wembley, Eastcote, Hatch End, Pinner, Rayners Lane, Carpenders Park, Ruislip, Northolt, Greenford, Stanmore, Perivale, The Hyde, Colindale, Kingsbury, West Hendon, Mill Hill, Arkley, HA1, HA0, HA9, HA3, HA4, HA5, HA2, HA7, UB6, UB5, NW9, NW7