Old House Refurbishment

We are in the process of setting up a DIY team/project to help people in Cambridge make improvements to their houses to cut down on carbon emissions. Plus I'm doing the same to my own and looking for the next affordable step.

A 'problem' with Cambridge is that most of the current housing stock is around 100 years old or more - so single skin brick which cannot be easily insulated.

However, i saw a report yesterday which said that refurbishing old houses was more nergy efficient then new build over a 50 year life span due to the carbon required to build the housev refurbishment. Links are:
resting http://www.emptyhomes.com/documents/publications/reports/New%20Tricks%20With%20Old%20Bricks%20-%20final%2012-03-081.pdf

It was reported in Sunday's Observer.
http://www.guardian.co.uk/money/2008/mar/16/homeimprovements.householdbills

The report led me on to looking at the Nottingham house which is about the same age as mine (Victorian/Edwardian) and therefore I can learn from many of the steps that they took:

http://www.msarch.co.uk/ecohome/feature.html

I think the next big steps for me are:

1. Insulate inside front walls (like the above house, I don't want to spoilt the outside brick work) but insulate/redner the outside back and side
2. Solar how water heating panels on the roof
3. Maybe heat exchanger onthe extraction fan?

More work...