Cheers fella's... The interesting thing is that I bought the nuts/bolts brand new from the stealer so I would expect them to be spot on. I've got some more ordered (coming in today) from the dealer so see how they go.

When I'm feeling a bit better I'm going to have a look at the second suspicious bolt (the first one is gone!). The second iffy one is loose rather than lost so need to see why this is... perhaps they weren't torqued correctly? It was a BMW specialist who I took it to but I don't know if you'll remember the worrying moment I had when I found one of their sockets with a couple of extensions on it still in my engine bay a day or two after?

While I'm here I should ask - If I get it on ramps (they give a lot of room underneath) how can I get the shaft to turn to get to all the bolts? Can I turn it by hand? Also, are all the bolts in front facing or are they three facing front, three facing rear?