This talk of drinking water from a radiator reminds me of that fabulous film, Ice Cold in Alex. If you don't know it please look out for it.
Hi Neil
These ambulances were known as K2s we used them in Casualty evacuations collecting from various airport locations and transporting the patients to various military hospitals in UK
The ambulance in the film was called Katie or Katy not sure which now but the K2 resemblance speaks for itself.
You brought back many memories of these super vehicles no cab doors just a half height canvas flap with fixings.
Between the seats was a flap in the floor with a tap to swap over fuel tanks when required.