Hey Jake,
You aren't a million miles away from me, I am in Rugby. Good luck with your build. If you are interested and don't own one already, I purchased a arc welder from Aldi....yep Aldi the other week. Specifically for this rocket burner, for the princely sum of £39.99. Great little bit if kit, has welded two gas bottles together and all the joints in my J section which is 100x100x6mm Steele box section!
Good luck mate.
Bezman