Ray's got it right. It's all well and good being a 'plumber' who can bang a few push fits on to get a bathroom in, but what happens when they come across something away from the ordinary that requires knowledge of how a system actually works? I worked for a Joiner the other night (Friday night/Saturday morning I think?) who called me out to repair a failed and leaking CH pump. After an hour of telling me he hasn't got a clue about plumbing, I got the job finished and putting the tools in the van, noticed on the side of his van it said "qualified joiner, builder and plumber"! I mentioned it to him, and he said he was qualified as he'd done an assessment somewhere and they'd passed him and sent certs out.
If that's what competition proper plumbers are up against, then it's always going to be an uphill struggle.
I personally only do emergencies (leaks, bursts, DIY disasters) and find it much more profitable than any normal plumbing or gas work I've ever done. Certainly when it's put side by side with boiler swaps and servicing etc, give me a panicking home owner with a DIY husband any day! I don't even advertise being GSR now, and I pass all those enquiries on to a mate who's almost retired. The last thing I want to be doing is stripping boilers down and taking fires apart with all the responsibility that comes with it, when I can turn up, repair a burst, replace a stop tap etc and be gone within the hour and on my way to the next job.
I could always go and work for the big boys (Bowmer and Kirkland are taking on for £100 a day in Manchester City centre) but by the time I've got my gloves on, my high viz, hard hat, goggles, ear defenders and found my way into a canteen full of farting, smoking, beer stinking builders after paying £20 to park for the day, I think I'd rather stick to what I'm doing.
As long as there are plenty of 'plumbers' out there to advertise their services and then make a total ballcocks of a job, there will always be a line of work for anyone willing to get their back side out of bed and follow up after them.
Absolutely no offence intended to anyone, I'm on my second job tonight and bored waiting for a landlord, so I thought I'd harass the UKPF!