Labour’s mansion tax debate won’t be a crunch vote (or very interesting)

So Labour is going to force a vote in the House of Commons on the mansion tax. It’s the key announcement trailed as part of Ed Miliband’s visit to Eastleigh today, and yet it’s the sort of thing that only really excites people who look forward to hearings of the Public Accounts Committee rather than the average voter who has a more normal perspective on life.

The idea behind these Opposition Day debates is that Labour flushes out any rebels or unhappy Lib Dems, or that its MPs can later tweet ‘Lib Dems voted against their own policy in the Commons tonight #evil #nevertrustalibdemagain’. Miliband says that very thing today:

‘And what about the Lib Dems? There could be a majority in the House of Commons when it votes on our proposal. But only if the Liberal Democrats vote with Labour. Now the Lib Dems say they are in favour of a mansion tax.