I was chatting to the guy from British Gas who came to fit my Smart Meter and he mentioned a new wallpaper [felt based I think] that was going to become the new 'must have' for insulating your home.
I can't have cavity wall insulation so any small changes I can make would be of interest to me.... but I can't find anything on it [admittedly I haven't looked that hard].
not felt http://www.mgcltd.co.uk/sempatap-thermal here's a fibre one but they don't recommend ordinary paper over it http://www.coveryourwall.co.uk/wallrock-kv600-thermal-liner-insulation.html a lot of different ones http://www.gowallpaper.co.uk/thermal-wallpaper.html article...
i guess worth it if it solves a damp problem or saves you massively on heating bills. it needs to be compared to the cost of cavity wall insulation i suppose, although I am not sure if the efficiency is comparable