Nah, I've not been on a constant diet or low intensity training for 2 years. You have to lose weight in chunks, stabilise it and enjoy life, do some seriously hard riding for your fitness and then try and lose a bit more. When I'm losing weight I'll typically lose 3-4 kg in a week without too much hardship. Have a search on the web for "heart rate zones" and you should find plenty of info on how your body burns fat in low aerobic zones, not anaerobic zones. Basically, it's pretty difficult to lose weight during hard training stints. You'll lose weight instantly through fluid loss, but for most people high intensity just burns carbs which naturally need replacing, so you just eat more. You may also have seen this weeks's Cycling Weekly talking about Team Sky's nutrition? Alex Dowsett specifically says, "If you're trying to lose weight, don't try to lose weight and train. If you're trying to lose weight go through a phase of light training so you're not compromising either one."
Anyway, it works for me. Low intensity training won't make you a strong cyclist, but it will help make you a lighter one if you follow the right diet. (It may also improve your stamina on long rides too as your body will learn to tap into the fat stores more easily during the easy sections and save your glycogen stores for the hills / hard pushes). IMHO anyway
Oh, and the beauty of the turbo trainer for me is that I cannot ride below 70% max hr on the roads. A) it's dull and B) its impossible in the Peak District!