• A.S. Travel Ltd
  Apsley House, Apsley Road, NEW MALDEN, Surrey, KT3 3NJ
• Ast Ambulance Services
  Apsley House, Apsley Road, NEW MALDEN, Surrey, KT3 3NJ
• Beds & Bucks Private Ambulanceservices
  57 Oulton Way, WATFORD, Hertfordshire, WD19 5EJ
• Britannia
  PO Box 247, Bricket Wood, ST ALBANS, Hertfordshire, AL2 3ZS
• C L M Medical
  1 Harvest Road, FELTHAM, Middlesex, TW13 7JH
• Central Ambulance Training Services Ltd
  Suite 23, 497 Sunleigh Road, WEMBLEY, Middlesex, HA0 4LY
• Chalfont Line Ltd
  2-4 Providence Road, WEST DRAYTON, Middlesex, UB7 8HJ
• Harley Street Air & Road Ambulance Service
  8 London Group Business Park, 715 North Circular Road, LONDON, Greater London, NW2 7AQ
• Heathrow Air Ambulance Service
  Ancoats Lodge, Bangors Road North, IVER, Buckinghamshire, SL0 0BQ
• Inter-County Ambulance Service
  Gravel Hill, Chalfont St. Peter, GERRARDS CROSS, Buckinghamshire, SL9 9QX
• Location Medical Services
  Shepperton Studios, Studios Road, SHEPPERTON, Middlesex, TW17 0QD
• London Para-Medical Services
  1 Admiral House, Cardinal Way, HARROW, Middlesex, HA3 5TE
• Middlesex Ambulance Service Ltd
  10 Tudor Enterprise Park, Tudor Road, HARROW, Middlesex, HA3 5JQ
• National Ambulance Service
  4 Commercial Way, Abbey Road, LONDON, Greater London, NW10 7XF
• National Ambulance Service
  Apsley House, Apsley Road, NEW MALDEN, Surrey, KT3 3NJ
• S.E.S Ambulance Services
  17 Lichfield Road, NORTHWOOD, Middlesex, HA6 1LY
• South Central Ambulance Service NHS Trust
  44 Finchampstead Road, WOKINGHAM, Berkshire, RG40 2NN
• Southwest Property Services (London) Ltd
  1 Admiral House, Cardinal Way, HARROW, Middlesex, HA3 5TE
• St Johns Ambulance Brigade
  Bell Lane, Northchurch, BERKHAMSTED, Hertfordshire, HP4 3RD