[Vintage_RC]

Thanks for the replies regarding Southern Surplus, it was a long time ago and I was just getting into all things electrical but it sounds as if I remembered their name correctly. I could easily have got their precise location wrong. I was a regular at Watts radio but that would have been late 1950's and early 1960's. I did make the odd visit later than that and after they closed one of the staff opened a shop near Hampton Court bridge.