On Mon, 30 Apr 2007 21:54:25 +0100, Alistair Riddell
wrote:

No problem at all, so long as the joint is accessible and soundly made
with terminals capable of carrying the current and in an enclosure
complying with a relevant BS or EN standard.

Thank you. Can anyone advise which is BS standard is teh relevant one?
The junction box looks rather dated, being dark brown plastic rather
than the typical modern white type. But it does say "30A" on the back.

Should the junction box be screwed to a joist? (It is under the
floorboards, lying on the lath and plaster of the ceiling below).

Harold