hate the fat guy looking at me in the mirror

Hi all im Jonathan and I live in York , England, used to Pretty fit, run every other day, play football (real football lol) ended up dislocating my knee, and its not been right since, that's resulted in me gaining 4 Stone in weight, but now ive started working out hard again (minding the knee that is) And going to combine that with diet :-) Currently at 19.5 Stone :-( wanting to get back to 15 Stone , need to see my six pack again :-)