Carting all that skin about is going to be bad for his heart as well as many other systems. To say 'you're not getting treatment free because you once ate too much' is simplistic and a bit vindictive. I think this chap has shown the great lengths he is prepared to go in order to get a normal figure - all praise to him.
However, the point is made that he needs to be at a stable weight, as further weight loss will only add to the loose skin problem. He says his ideal weight is 15st and he can reach that if he has the skin removal. He still looks as if he has surplus fat, as opposed to surplus skin, so he does have further weight to lose before he should get the surgery.
I can't help feeling though that he will have little incentive to keep losing weight if he feels that the NHS will refuse him the necessary surgery. So to set a possible date for him to lose the weight by, plus a bit to stabilise, then a tentative date for surgery, could be the best way to go. He needs support and encouragement for his achievements, not antagonism and blame. To give him the surgery may cost the NHS in one department, but not to will mean enormous expense with his on-going care in other departments.
But, it does raise the question of just how much surplus skin someone would want removed but expect to qualify for NHS treatment. When does vanity turn into a health issue?