Michael Wills at the Justice Department has dropped the biggest hint yet that the government are planning on introducing the Alternative Vote (AV).
He even suggests it could happen before the general election and without a referendum.
AV is such a minor change that it makes sense not to have a referendum. It requires no change of boundaries and does not affect in the slightest any of the so called positives put forward in favour of first-past-the-post (erroneous as most of them are). The 'constituency link' would be the same, it would just mean ranking candidates rather than putting an x and MPs would have to get a preference from a majority of voters rather than just one more vote than any of the other candidates as at present - which can result in an MP most people voted against.
The downside is the Tories will play this as gerrymandering and will get a receptive audience. It would smell of desperation from Labour.
The better option is just to give people a say on a proper proportional system rather than foisting another non-proportional system on the public - even though slightly better than what we currently have.