Wear lots of thin layers rather than thick ones. If you have a furry rug, wear that with the fur side inside. Natural fibres are better.

Wear a hat and if you have long hair, leave it inside your clothes - makes great insulation!

Have you got a wheaty bag? It's a cloth bag of dried wheat that you put in the microwave to heat for 2 mins and it stays warm for a long time. You could knock up something similar with popping corn but don't let it get moist - you'll end up with a bag of popcorn!

Can you borrow some screens or something to block draughts?

Good luck. I know what it's like to be cold.

LTS