So if this classes as 'gas work' the issue's just whether I (or the
slightly more knowledgable mate who's helping me out) am competant to
do the work then?

"From the title I thought you wanted to go one better then the "stick
head in a gas oven", and perform some accrobatics with your partner in
an oxyegen free environment ........ "
Now that would be a difficult piece of DIY Must be spending too
long reading about defense spending - the innuendo's starting to wear
off...Someone must have been laughing when they decided to call a
missile a 'penaid'....

Jon