Tristan Garel-Jones has just told them to join "a little party somewhere that wants to leave the EU". That is the word from the grandees, including Cameron: they can all clear off to UKIP.
Then they can all lose their seats the way the SDP did; large numbers of Labour supporters wholly or broadly agreed with the SDP, just as large numbers of Conservative supporters wholly or broadly agree with UKIP, but voting in this country is tribal.
And the numbers will be made by the Lib Dems, organisationally absorbed into, but ideologically absorbing of, the Tory machine. Like the Liberal Unionists, the Liberal Imperialists and the National Liberals before them.
That is what Cameron actively wants to happen.