Four months and counting on Tory-Lib Dem coalition?

I'd been wondering when the "deal" on electoral reform, that was Liberal Democratic Party leader Nick Clegg's price for joining in coalition with David Cameron's Conservatives in Britain, would happen.

Guess I'd not been reading the Guardian often enough to see that a referendum on alternative voting, i.e., an instant runoff system, to replace the first past the post system, has cleared the House of Lords and is set for May 5.

Hence the four months and ticking.

British voters will go to the polls May 5 for a vote on electoral reform, the promised payout by the Conservative Party to Liberal Democrats for joining it in coalition.

Britain's biggest union has officially come out in opposition, though. That despite the fact that the Labour Party could benefit.

Labour Party leader Ed Miliband says he will campaign hard for a yes vote. But, will the party as a whole follow him? So far, 114 Labour MPs have pledged opposition. Even more, on the other side, will the Conservative rank-and-file follow Prime Minister David Cameron? For that matter, how enthusiastic and active will Cameron be in working for the measure?

Witin Labour, it appears, per the opposition of Unite and another large union, to be an Old Labour vs. New Labour split. As Miliband was elected to leadership with union support, it's surprising to see him so ardently push a yes. Could a failure in the referendum not only dissolve the governing coalition, but lead to a putsch against Miliband at the next Labour conference?

As the Guardian notes, Labour proposed IRV, also known as alternative voting, before the most recent national elections. The same editorial notes that Miliband's in his and Labour's interest to push yes, with either a win or a loss drawing Labour and LibDems closer, especially since Cameron's past record is of opposition. (That said, he seems to be honoring his pledge to LibDe's Clegg very narrowly - just putting the referendum on the ballot and not campaigning for a yes.)

Also, by Cameron insisting the referendum be put on the same day as local/regional elections, it looks like Cameron has wrong-footed Clegg pretty well. That is, unless the push for electoral reform really doesn't matter as much to Clegg as it does to the party faithful, as seems the case with other LibDem issues.

The Guardian has a webpage dedicated to the contest and its various issues.