Right. The MK Data Sheet has, of course, always said "13A per socket outlet" but, despite my valiant attempts to find out from them in the past, I've never really understood exactly what they mean by that in relation to a double socket - i.e. whether a double socket has one or two "socket outlets". I was have thought the answer was 2, in which case the 'rating' would be 2 x 13A, but that would be inconsistent with MK's famous statement that serious thermal damage could result from sustained total currents greater than 22A!No, BG - the OP's picture.
Kind Regards, John