Again thanks Dave, you have been a great help to me, much appreciated. I read the wikis and now know where each of the oil sensors are located, front of engine and oil cooler. I remember also that while getting the starter motor out, i managed to break some of the smaller cables in the engine bay, they were all odd bits and pieces other owners had joined and re+joined over the years, so colour coding was out the window

Anyhow, i rejoined a couple of those cables not really knowing which was which but do remember them going to the sensors of the engine and oil cooler, and anyway i think i may have connected them wrong. So i tried it, swapped the oil cooler sensor cable to engine oil cooler sensor and visa versa and my troubles vanished. Is it possible this could be all that happened? I do not know, so until told otherwise I will assume they are now right way round, and I am okay.
As for the sealing washer on the pump, I must try and source that locally (Finland) which may be nigh on impossible but can only try
