This such a fast-moving situation that I can't keep up with all the developments and I am going to stop trying. However, it appears that the Conservatives have now offered the Liberal Democrats a referendum on AV so that there is evidently a Dutch auction going on. Whether it dignifies the political process is another question.
Meanwhile tempers are fraying as in this extraordinary exchange: Boulton v Campbell I am not a great fan of Alastair Campbell, but he certainly comes out the better.
Underlying all this is the fact that it is very difficult to create a stable government out of the House of Commons as it stands so the voters may well be asked to decide again this year.