Luke wrote:

I
did try the wiring puzzler involving the lights up a pole but drew a
blank.

Well the question did not make sense. The obvious solution using two double
pole switches works fine depending on how RR wants to place the switches,
cables and diodes and more importantly, he never gave a rule on switch
positions and which lights should be on depending upon the switch positions.

If it is

battery =={2 core cable}==switches== [2 core cable] == [2 LEDS wired in
parallel in opposite directions] then it is easy.


--
Adam