I don't know English code, but I know my own code and doubt there would be a problem. You wouldn't be able to get as much current out of the outlet because the light takes some, but the breaker would limit that so as long as the install is to code you're probably fine and in fact your house probably already has lights and outlets on the same circuit.
At the point the question just becomes "how much to fix it?"
Sparkies aren't cheap but good ones are really good.
Sparkies aren't cheap but good ones are really good.