I'm in the garage again today with mine. I spoke to a few guys at work the other day and they said that if I've had a new battery fitted, which I have, that it might need recoding? I've not heard of this before but I'm clueless with cars but I'm going to mention it when I arrive.
It's a Vauxhall specialist so will see what they come up with but not keen on the idea of replacing parts for nothing to actually change so want to make sure I know where I stand with that as they can take the new parts back if it doesn't fix the problem!!