Portable Gas Heater

[Wind Dancer]

I carry one of these little heaters and am very pleased with it. It doesn't half heat up quickly and can be positioned anywhere (safe).

PORTABLE GAS OUTDOOR CAMPING FISHING HEATER 4 REFILL | eBay

I was thinking about cooljules plight when I remembered this!

You can get them from about £10 if you're lucky. Think I paid £17 including 8 canisters.

 

[Sparks]

Got one of those in the van at the moment. They're a nice little portable heater, chucks some good heat out too.
They do produce a lot of condensation though and you have to be very careful with ventilation.