Well that was a particularly painful and soul destroying experience.
Made it round, was going well till just about mile 7 then it all went wrong, ended up almost passing out and got really woozy with tingling in my fingertips. I've never had that before even in longer runs in extreme heat.
Ended up dropping the pace *right* down and walking the hills.
Anyway its done, a new PW for the 1/2 marathon but another medal for the collection and I've got a few months before the next race and 16 miles of hills.