Handy for people who don't always have access to electric in their line of work (me for example). Working on a remote site for example. I'd be lost without a gas iron.
Maplin. Overpriced as always. I like how how Maplin is going downhill with the recent store crisis.
Why this and not an electric iron?
Do yourself a favour, spend another tenner and get the Dremel Versatip. Outstanding piece of kit, you won't regret it!
....or £14.39 even http://cpc.farnell.com/iroda/pro-50/soldering-iron-gas-30-70w/dp/SD0110602?ost=SD0110602