Boris Johnson faces a showdown in Parliament later after No 10 officials warned he would call for a snap general election on 14 October if MPs succeed in seizing control of Commons business.
Rebel Tories and Labour MPs are planning a bill to stop the UK leaving the EU on 31 October without a deal.
Mr Johnson said he did not want an election, but progress with the EU would be “impossible” if the MPs win.
Jeremy Corbyn said the Labour Party was ready for a general election.
But shadow Northern Ireland secretary Tony Lloyd later said Labour would vote against any government plans to hold a general election before the UK is due to leave the EU on 31 October.
He said Labour “will not have Boris Johnson dictate the terms of an election that crashes this country out with no
Under the Fixed-term Parliaments Act, Mr Johnson would require the backing of two-thirds of the UK’s 650 MPs to trigger a poll in the autumn.
A number of MPs have come together across party political lines in a fresh bid to stop a no-deal Brexit, after Mr Johnson vowed to leave the EU with or without a deal on 31 October.
When Parliament returns on Tuesday after recess, they are expected to put forward legislation under Standing Order 24 – a rule that allows urgent debates to be heard.
The bill would force the prime minister to ask for Brexit to be delayed until 31 January, unless MPs had approved a new deal, or voted in favour of a no-deal exit, by 19 October.
In a televised announcement on Monday, Mr Johnson insisted he could achieve changes to the UK’s current Brexit deal at an EU summit on 17 October.
But he said that if MPs voted to block the option of a no-deal Brexit they would “plainly chop the legs out from under the UK position” when he is negotiating.
The legislation to be put forward on Tuesday seeks to tie Boris Johnson’s hands, and instructs him to ask the EU for an extension of the Brexit process until 31 January 2020.
A lot of attention will be on the clause which says that if the European Council proposes an extension to a different date, then the prime minister must accept it within two days, unless that extension has been rejected by the House of Commons.