MPs are due to debate and vote on a motion later today (28 October 2019), in the House of Commons, to hold an early General Election on December 12 2019. Under the Fixed-Term Parliaments Act, an early election can only take place if it is supported by at least two thirds of MPs.
If agreed, the PM will attempt to pass the legislation for the current deal in the time before Parliament is dissolved (6 November 2019).
Labour have indicated that they will not support the motion.
The SNP and Liberal Democrats parties together have proposed their own plan to trigger an election. This, they say, could be achieved by introducing a Bill to amend the Fixed Term Parliament Act and setting a specific date of 9 December 2019 for the next General Election.