Re: I'm all right Jack...
My Mum-in-law has an old brick end terrace, no cavity walls. She has good loft insulation, but can't add external wall insulation (conservation area). Adding internal dry lining would shrink the already small rooms even further, it's also a minefield because if it isn't done properly it can create huge problems with damp.
Sometimes you can only do your best, and live with it.