I'm a 40 something guy, who's bad living and poor lifestyle has finally caught up with him, the scales don't lie !!

I have set, what I think is an achievable, long term target weight. Short term my target is to be under 100kg by Christmas and, I have a sports event to attend in January and I have a certain T shirt that i want to wear to it, which, is, well, a bit tight at present !!