Hah!
@Ritho
Yeah funny guy
@George
OK, gotcha now (thanks to Ritho...). What we call a mains extension lead but power bar sounds better I guess.
Funny it doesn't work with those, must be too much resistance with all the joints or something. Or more likely a capacitative or inductive effect perhaps. Or the signal is only good on single cores, and in the 'balanced' twisted cores in an extension lead, the signal gets cancelled.
Still need to know if it works on a different breaker circuit. Oh well.