To be honest fitting gas fires isn't really something I do often. Mainly because there is often building work involved and I think your better off getting someone who does it all the time as. I don't mind doing them if it's a simple swap and will do repairs or servicing. I wouldn't be able to do it for a couple of months anyway.
If you want to contact me on 07915065842 and have a chat about exactly what you want doing I may be able to help. If not I should at least be able to offer some advice on what will need to be done.