Dear Stoned,
welcome to the forums from another Brit. It's kind of "you pays your money..." etc. Traigia kit is initially a bit on the steep side, i.e. £20 wont buy you much. Try £45-50 for a basic kit without a kettle. Now you can get Chinese copies (with kettle) for about £20 but I really wouldn't recommend them. If you shell out for Trangia you can be sure of several things:
- it will work almost anywhere (best outdoors though

)
- it will last a lifetime
- it's a simple low tech operation
- fuel is always way cheaper than gas
The drawbacks (apart from the initial outlay)
- it is slower than gas for a quick brew
- sometimes it's hard to notice if they are still lit
- they are sometimes a challenge to light
- you will get the odd burn (part of the fun of camping!)
My advice is get a Trangia (a real one) and buy a cheap single burner for brews at lunchtime, afternoon tea, etc. If you're in no hurry just use the Trangia and skin up while you're waiting for the kettle to boil.
SD