Thanks for that. My suspicion is that the new light fitting is faulty. If I test the blue (possible earth) from the ceiling, what should expect to see on the test meter?
I thought I'd put up my new light fitting today - I've done this several times in the past, but never this particular light - an electrician put up this light fitting several years ago. As always, I took a photo (attached) of the wiring before I removed the old fitting and was surprised to see a blu...