As the polls get inexorably worse, as people realise that NuLabour is once and for all morally and intellectually bankrupt, finally a decision is made to go for voting reform. Why noone had the backbone to attempt this while Robin Cook was alive is beyond me, but there's no doubt in my mind that Gordon Brown needs this to have any chance at all of winning the next General Election.
I also agree with compulsory voting with one big proviso. There needs to be an alternative on the list of 'none of the above'. If enough of the electorate chooses that option in the constituency then that election would have to be re-run with candidates more acceptable to voters. If they're looking for greater legitimacy that would have to be a core component really.