Competent, there's a funny word. Its so open to interpretation it's almost meaningless.
I raised this with a former employer, I work on simple 3 phase stuff, replacing motors, contactors etc, fault finding....I dont have a qualification to my name.
I raised the issue with them from a legal and H&S perspective. They considered it fine, I was internally trained by a qualified electrician (not formally but on the job training)
IIRC, you used to be able to install gas cooker bayonet hoses..if you were 'competent'...which is laughable really.