Once you have checked that you have got gas, call an engineer.
Anything that involves gas, flame, fumes or ventilation comes under c.o.r.g.i and the health and safety regulations .
It is forbidden to do this kind of work unless you are competent.
The definition of competent is set out by the H.S.E.
It does'nt mean anyone who can turn a spanner or twist a screwdriver.
U:plumb
June 2007