Thanks for the tips.
I have put some extra bedding in as well as some shredded paper towel and I think i'm gonna buy a little heater for my room.
Earlier I put a cardigan over the cage while she was asleep and I was quite surprised at the difference it made. It just stopped the cold getting in.
The cold hasn't seemed to effect her in the slightest which is good.
She's still as happy as larry.