Just hoe ok an update on this,firstly I contacted Path finder Avation at Archerfiled and told him my situation and the instructor told me is would not be a problem in their Jab 170?? The guy I spoke to, I think his name may have been David, was more worried about my height, I am 6'2" So I am going down on the weekend to see if I fit in the plane.
However this thread has been alot of motivation. I realised that I don't just want to learn how to fly, I want to actually fly, as in fly where I want, with passengers etc. At my current weight I might be able to start training, but I wont be able to carry the fuel I want, or fly with my big fat brother in law. So I am changing a few things in my life around and alreaady I have lost 3 kilos, (or maybe I should be thinking, gained 3 litres of Avgas??)
Just hope everything goes smooth on the weekend then I can take my introductory.