You could speedily lose a lot of your excess weight, which is mainly fluid retention, by seriously cutting down on salt and salty food. I realise you really like salt because I've heard you say so on your Radio 5 show, but the fast, safe weight loss and the other many health benefits of cutting down on salt/sodium would be well worth it to you. - You would feel sooo much better!
I've rung your show and emailed several times over many months to tell you about this safe, sure, fast way to lose excess weight, but I have no way of knowing whether you ever receive my messages.
See Sodium in foods
Read my Mensa article on Obesity and the Salt Connection