Best way to get in to it is to sign up with a few agencies as a fitters mate....as your a lagger already you will probably be ok . I served my time as a coded welder but took interest in the fitting of the pipes aswell... now i do both.
So , work as a mate for a wee while anyone can do that really ..and then progress on to a fitter.
Some cracking jobs out there. I am on a good one at the mo..... 4x 6inch butt welds a day, job n nock home for 2pm ....friday 2x 6inch welds home for 10am ish ....£200 a day...
Was on a job in london a few year ago about 30 lads on the job , all in digs near each other ....Pished every night ... sneak off the site at lunch for a gob full also happy days .... met some top lads on my travels..
Still wana be a porn star though