Thank you all, I dont know why we came to the conclusion it was positive earth. It was probably a combination of 3 head scratchers making 2+2=5. Should have paid more attention to the wiring before dismantling it! I carefully unravelled the loom from the Morris , labelled each wire up with a sticker with a code number for reference and duly wrote them all down on a couple of sheets of paper. Can I find that sheet of paper? Can I b****r!
Saw a pic of your Morris on another thread Julian, was that your White next to it?
Yes both sides of the windscreen do overlap the middle, but I dont know if you can see from the photo one side seems to have a larger surround than the other side. If it is a running repair, its going to be a bit of a pig to completely refabricate another side from scratch. If I get chance I will take a couple more detailed photos of each side. Thanks all