Jon,
I was not suggesting the ONS projection is or will be accurate, just asking you to cite a source for your projection of 77 million, which would be an increase of ~24% rather than 13% for the ONS figures.
The cars on the road situation is obviously driven by the recession, but if you read the article I linked to you would see it uses DVLA data on registered cars and not data of cars actually "on the road" rather than in garages, i.e. more cars were removed from circulation than added. Clearly this situation is unlikely to continue, but I thought it was interesting.
"It is simple arithmetic that 15 million people will need close to 15 million homes." - how so?
My 26 million figure was from an ONS estimate of 26 million households in 2011, not 2030. This would indicate that (for say a 63 million population next year), that an average household has 2.4 occupants. What is your reasoning that this will decline to less than 2? I've actually found a better estimate than the one I was using earlier now:
http://www.communities.g...tics/2031households0309 This suggests a rise to 27.8 million households in 2031, rather than 40 million as you suggest. Again I'm not saying that the government's projections will be right, I am just wondering what the reasoning is behind yours?