I'm aiming to make a highly interactive presentation in which we will try to crowd-source an "IET consensus pathway" in the UK's 2050 Calculator. To help the discussion go well, I'd like to encourage people who are planning to be in the audience, before the lecture, to play with the calculator, and to identify the levers they would most like to discuss during the lecture. Please use the comments area at the foot of this blog-post now as a discussion area. Please feel free also to discuss your preferred pathways or preferred settings of individual levers, and to discuss particular issues or trade-offs that you think should be part of a useful conversation using the calculator.
The outcome - Here is the pathway that we got to after one hour - I will write a few notes and propose possible tweaks in a moment. Top things that needed doing: (a) check which fuel mix for the CCS power stations works best; (b) check which choice of fuel from bioenergy works best; (c) explore space-heating options - the audience asked for a 15:25:60 mix of fuel-in-home (eg gas boilers):district-heating:heat-pumps, and the "CD" heating mix doesn't match this perfectly. Thank you to the audience for a fun evening!
Update - After the lecture I made a few adjustments to the above pathway which I think the audience would have been content with. The resulting final IET London pathway (March 2014) is here. The changes I made were as follows: (a) I checked which choice of CCS power station fuel (solid/gas) was best for emissions, and selected "D". (b) I checked which "type of fuels from biomass" was best for emissions, and selected "B" (mainly solid). (c) I adjusted the commercial heating choice to "D,A" so as to make the overall heating mix for homes and commercial closer to the heating mix that the audience voted for. (d) I double-checked whether choices (a, b) were still optimal. The resulting pathway achieves a 77% reduction in emissions on 1990 levels (pretty close to the 2050 target of at least 80%), and requires no backup generation in mid-winter when the wind doesn't blow.