In reply to RobOggie:
Sounds like a very difficult situation and impossible to do
natural cardio in that condition. By that I mean just walking around, going up to crags, cycling and most of the stuff that's just done naturally without any intention of losing weight.
I remember hearing that studies found that the most effective way to lose weight is not by exercise but by modifying one's diet.
Loads of diets out there. I think the 5:2 fasting diet is good and popular, perhaps because you only need will power 2 days per week. Two days each week you have just one meal. Over time I think it retrains your appetite too, perhaps by shrinking one's stomach. I think a higher fat, lower carb diet also helps, particularly if you're not that active at the moment. Carbs are good if you're very active, and/or training a lot but I think its easy to cut right down if you're not. Eating fat makes you feel fuller for much longer and I believe its meant to stimulate release of fat burning hormones which then help with burning up the body's store of excess fat. And cutting out sweet and salty foods too because they stimulate the appetite: encourage you to eat more when you probably don't need to.