So far, everyone has - understandably - focused on the UK-wide Parliamentary arithmetic.
But look at the position when it comes to legislation that affects England only. In England, the Conservative Party has 297 seats (298 if as expected we win the delayed poll in Thirsk & Malton), Labour has 191, the Liberal Democrats 43 and the Greens 1. In other words, in England we have a clear majority of the seats. A coalition of Labour, the Liberal Democrats, the SNP and Plaid Cymru could only pass legislation affecting England only using Scottish and Welsh votes. As committed unionists, Gordon Brown and Nick Clegg should think long and hard about what the long-term consequences of doing so might be.