Thanks guys - having had a night to think about it, and reading all your posts has made me feel a lot better about it - I was only a couple of minutes behind my target, and I know why! Think I'll target one of two local halfs in October to aim for sub 1:25:00.
My OH said I honestly looked like I was going to collapse as I passed the 13mile marker - lol! She wasn't even sure if I'd seen her because I ran past in such a daze
