The Natural Philosopher wrote:

It is perfectly possible to use a small camping gaz stive in a closed
vehicle, provided you do it on a fireproof surface, and have the
vehicle fan running.

The floor of an estate vehicle is as good as it gets.

Hmm, good point. With the fan turned up full there's no shortage of through
draft. With the rear seats removed there's plenty of space to set up a
stove. Might reconsider that one.

Thanks.

Tim