Damp Cold Bedroom - What Can I do?

TBagpuss

Is your maisonette on the top floor, and do you have any access to the roof space?

When I moved into my current house there was a lot of mould and condensation in the bathroom. I assumed that it was mainly lack of ventilation, but the surveyor told me that he thought it was mostly because the insulation in the loft didn't go right into the corners, so there was a cold patch, which resulted in condensation.
An extractor fan helped a little but putting in new insulation in the loft and making sure that it goes right into the corners made a much bigger difference.

It sounds as though your main problem may well be the walls, but it might be worth checking the roof as well, if you are on the top floor.

It might also be wroth writing to your landlord (keeping a copy) detailing the issue, setting out the steps you have taken to prevent it (e.g. ensuring that you open windows to air the room, avoiding drying laundry etc) and repeat the request to address the issue.

It may also be worth pushing your GP (or considering switching GPs) to try to get the referral you need; can you ask your GP to write a letter confirming their diagnosis and that the *only* reason you haven't been referred to a consultant is your age?

Cakeguts

I think a hot water bottle is a very good idea. Or you can get things you put into the microwave these days. If you put a hot water bottle into the bed to warm it before someone gets in and then give them one to sleep with if the insulation on the bed is good enough it should be possible to stay warm.