Thank you for a very informative, if somewhat depressing, article.

Just for absolute clarity, your figures for oil do include that used for transport?

We are not going to get there anytime soon, and a massive shortfall is now certain, but has anyone got some back of the envelope figures for how much electricity generating capacity would be needed in the UK under the assumption that all heating was by this means, but air-source heat pumps were used with an average efficiency of 2.5, as higher efficiencies rely on new build?
If the presently most inefficient grade F and E houses were brought up to a more reasonable standard of insulation, what would then be the requirement?

As you point out in the post I am replying too, in the UK we could certainly do with a 'New Angel!' :-)

Its all oil consumed in UK.