Thanks for your help, much appreciated. Saw my neighbour outside and discover his best mate is an electrician so he's going to come over later ... probably the best
It only goes "occasionally" but too frequently to ignore. I've got a suspicion it's one particular double socket and I'm wondering if taking it off might reveal a lose connection. On the other hand if it's just overloading a particular circuit (Mrs uses that plug for ironing) I won't see...