A "people carrier" is a British term for a large car, such as a Toyota Previa, Ford Galaxy or a Vauxhall Zafira, or other similarly-sized vehicles. They are normally designed to carry 4-7 passengers, although they could have seats removed to enable them to carry more kit. The picture right of centre on the LAS's home page: http://www.londonambulance.nhs.uk/ is of what I think would be considered a people carrier.