Thanks for the advice, Now sorted with a simple electronic timer thanks to this forum. So my enlarger Leitz Valloy II is is wired to a UK 3pin plug but no earth wire, I have a Kettle style three pin plug for the enlarger timer to connect to the enlarger. Th instructions for the timer show the enlarger being earthed into the plug that connects to the timer. There is no earth wire so do i need to earth another way or is it ok without?