Thanks! I've not done any DIY involving electrical fittings, so I'd hesitate to try that I think - though your directions are really clear. Is that something a painter and decorator should be able to do?
Sorry if this has come up before - I had a ceiling light fitting replaced, and the new ceiling rose is smaller than the old one (about 2-3 cm smaller in diameter). The surface of the plasterboard around the new rose is worn which means the new fitting sits in from the surface of the ceiling, and the...