Haven't checked water pump yet, but will do.
I'll definitely be pulling the stat out and checking to see if it's working or not. Just priced a new one, £52 inc VAT from my local motor factor! Was quite a funny phone call actually, they needed a registration number to identify the exact model of BMW I had so i gave them the one of the donor. The line went very quiet for a while so i asked if I'd got the number right, and explained i wasn't sure as I'd broken the car a couple of years ago.
With a huge sigh of relief, the lady on the other end says "I'm so glad you told me that, I didn't have the heart to tell you your car had been scrapped!"