Went to see my regular doctor today - wasn't given any medication, so I guess that's a good sign of nothing too serious. He did give me a fit note for work, citing "Mood disorder" and "Obesity" as the primary conditions leading to my being unfit for work.
He asked me how long I wanted the fit note for. He asked me the same question last year when my depression was playing up, and back then I didn't know how to translate my condition into an accurate amount of time I should expect to be unfit for work for. Well, the same can be said for today.
I threw out a random span of time (four months) and he was gobsmacked - how are you supposed to actually work out how long you're going to be ill for? It's going to take a lot more than a month for me to lose enough weight to be confident beyond the limits of my house.
He told me they can't justify a fit note for longer a month just for obesity. I left the surgery feeling so ashamed of myself.