To start, how about this?
Unless there is a change, Britain is in jeopardy of becoming entrenched in a system of almost permanent one-party Conservative government: elected by a minority but able to exercise the exclusive power of a majority.
Or perhaps this?
There should be a parallel debate … about the future of progressive politics, how it is reconstructed and reshaped into a winning coalition. This should include Labour, traditional left and right, the Lib Dems, those disenchanted with both main Parties and those not at present…