Monty, sorry to hear that you're hurting. Does your running affect your back?
The back's feeling a lot better today thank you, no twinges or anything. I went running/dog walking earlier and no after effects whatsoever. I think in a strange way it actually helps, it helps to re-align your posture. That said I did have a good nights sleep, also yoga poses like downward dog do help.
Sandy, you didn't pass through Sheffield did you, If so I would like to offer you my apologies. Also did you visit Malham Cove/Rocks. If so you might have recognised it from the version of 'Wuthering Heights' with Ralph Fiennes. It was also in 'The Trip' with Steve Coogan.