OK... I now know which of the BLACK wires are my "Switched Live" I have placed a band of red insulation tape to remind me. So, I have now:- 1 x RED 1 x BLACK (lLive Switch) 1 x BLACK 3 x EARTH On the connecting block for the new light is has only 4 connecting blocks: BLUE -N- GRN/YEL -E- B...