H Alex, sorry not to get back to you sooner. I completely forgot that I had a board meeting to attend yesterday. It sound very posh and important being on the board of directors for the local camping and canoeing center. Let me assure you it isn`t. This is a not for profit organisation and all the board members do it for free. We provide outward bound training for kids and etc as well as certificated training for rescue personnel. I spent most of yesterday in meetings and all of today doing the same.
I will try to get some multi meter readings for you in the morning so that you can compare your readings and hopefully we can identify the issue and get it resolved. Do you have a multi meter, or could you borrow one from a neighbor or friend? You could probably pick up a perfectly serviceable one at the local hardware store for 10 to 20 quid. It needs to do volts AC and DC and ohms (resistance)
Thank you for the photographs, I will try to work out some sort of wiring diagram based on them.
I`ll post my reading tomorrow.
Bob