The customised mountain bikes have been developed since their groundbreaking use by London Ambulance Service which operate in pairs. They have the necessary suspension, gearing and tyres needed for the riders to operate comfortably and safely throughout their duty. Carried in panniers on the bikes are medical gases and giving sets, an AED, the usual minor treatment kits, information leaflets for specific injuries and further advice, neck braces, slings and other vital equipment that would normally be carried by a first response vehicle.