Before you decide to switch, read this. I quote
Burney said the resurgence of interest in plumbing stems from the 'considerable myth' that tradesmen can earn up to £80,000. 'That is only true if you work very long hours, manage a company or are doing the Channel tunnel,' he said. 'The more realistic figures are below £20,000 for a newly qualified plumber, and then £30,000 with experience or £35,000 if you are supervising people. It may be a little higher in the south east.'