The Thames Valley Air Ambulance (TVAA), previously the Thames Valley and Chiltern Air Ambulance, is an organisation providing emergency medical services through the provision of a helicopter-based air ambulance covering the counties of Berkshire, Buckinghamshire and Oxfordshire in the South East England region.

[3][4] It is based at RAF Benson – roughly halfway between Oxford and Reading – with two pilots and a medical team.

It also operates five emergency response vehicles (ERV), which, like the helicopter, carries a doctor and paramedic.

[3] In the year ending March 2024, TVAA's income was £12.2 million, against expenditure of £12.2M, of which £7.9M was spent on operating the charitable emergency service.

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