An opinion poll in the constituency where Heidi Allen was MP suggests the Lib Dems are running neck and neck with the Conservatives.
Nationally, dozens of MPs have said they will not be seeking re-election at the December poll. Which ones in our region are standing down?
Heidi Allen, who represents South Cambridgeshire, has become the latest MP to join the Liberal Democrats.
MPs from the Anglia region have been reacting to news that Theresa May is expected to delay the vote on leaving the European Union.