They aren't compelled to and will hang on as late as possible just like 1997, they've got another 6 months of scorched earth tactics.
On another subject European elections are going to be interesting, including Germany
No Labour won, the Tories would have been spanked whatever the turnout.
The behaviour of Scott Benton is reminder that cleaning up politics need to be a high priority, enough of the corruption and cronyism while ordinary folk suffer.