The more i think about it the more i think i put the paddle in too deep whentrying to turn, this lifted the othe side of the boat up a bit and the wind did the rest as i was already over balanced. I know i went in feet first as my trusty tilley hat stayed dry!!!.
I know i could have righted the yak if i'd hung about and tried, it just didnt seem like the right thing to do in the heat of the moment. Really pleased with how my PFD worked though. I'm a big bloke 6'5 and 17st and i wasnt sure that a 50N PFD would be much use, but without it i would have been in trouble - dry suit definately the way forward, just need to be given one as i cant afford it!!!
I can see what you mean about hypothermia Simon, the water temp was comfortable when i was in it and swimming, as soon as i got out in the wind, i reaslised i was going to be in trouble. I could have walked back to the car from where we went ashore, but i thought that paddleing back would a) generate more heat and help my confidence (gotta get straight back on that horse etc)
2 new items in my kit bag now - heat blanket for hypothermia - and aquapac for phone and extra clothes and blankets in the car of course