In reply to Toerag: The simple answer is don't use unleaded petrol - it is horrible, toxic stuff, high in benzene compounds and various additives in addition to making stoves clog up.
Quite frankly, only someone with little concern for their health would choose to burn it in a stove that they are then going to be in close proximity to, unless they have absolutely no alternative.
Thankfully for UK use, you can reasonably easily buy Aspen 4T which is clean burning ultra-pure petrol specifically designed for garden machinery or other petrol engines with no catalytic converters where people are at high risk of breathing in combustion products. It is only marginally more expensive than unleaded and still far, far cheaper than ridiculous over-priced Coleman fuel. See
http://www.aaoil.co.uk/environment-Aspen-Stockists
I've never had a problem getting paraffin or white gas in Europe, North or South America although we did have had to use unleaded in Kyrgyzstan in the late 1990s in the XGKs we had.
Anyway, I've currently got a Dragonfly advertised for sale on here -
http://www.ukclimbing.com/forums/t.php?t=507748. It's in perfect working order but I now have an Omni-fuel stove so I can switch to gas when I want to keep things lighter and simpler.