Thanks for all the suggestions/help with the last car problem..... now onto the next!
Got a rotational noise. From where im sitting it sounds like its from the rear and does seem to get louder when I have the rear seats folded down. I would say it sounds like a typical rotational bearing like noise. It increases with speed and stays present whether the car is in gear or in neutral, foot on clutch, foot off clutch, whatever, always there. It appeared about 4 days ago and is getting worse.
I have swapped the tyres round on the passenger side because I thought it sound like it was coming from that side but it didnt make any difference (thought it might be a tyre problem).
When cornering it doesnt seem to get any worse/better.
Looking at the diff from beneath the car there is a slight weep from the drain plug.
My guess is its either a diff bearing, the diff is low on oil or its a wheel bearing but I would have thought it would have got louder upon going round a corner and loading up the dodgy wheel bearing.
Any advice, any other ideas? Im going to try and change the diff oil tomorrow night.
Only other thing worth mentioning (and it may just be coincidence) is that I had my 4 wheel alignment on saturday and it seems to have started since then.