Modular Ambulances are purpose built emergency vehicles based on a standard chassis with cab, usually with a maximum road weight loaded of between 3.5 and 7.5 tonnes. It is one of the most popular type of ambulance due to the interior space available to medical personnel to treat the patient, though due to its size not always the fastest way to drive through city traffic and unsuitable for off-road terrain obviously :)
Ford based Royal Air Force ambulance, registration N858AME.
Ed.: Two emergency units in no particular rush.
Honda, EU54BHF, looks like a EMU or Emergency Docto...