Eat less, but more frequently, take regular walks. You'd be surprised how effective that is at helping keep the weight at bay.
Eat less? Very difficult, that's the hard part. I love to eat. I take at least 1-2 walks a day since I got a dog. Actually I'm not horrendously fat, just out of shape and a bit of a belly @ 6'4" and ~240. I don't feel good though, that's the problem. Being out of shape will do that to you..
How much is 11 stone in pounds?
-edit-
Oops we are getting OT :oops: