Jane - me too, my cheque hasn't been cashed either.
I've done 16 miles this week and hope to do 12 on sunday.
Hippo - sub-5 IS possible and like Pix says, 11 minute miles is 4.48, so you have room for some walking - I managed it at Loch Ness and I didn't think sub-5 was possible.
I agree about the body thing - I'm sure I would be faster if I lost a stone, grew my legs and took 15 years off my age, but like Jane I'm not prepared to diet, and you can't do anything about the other things!