Mr Watson will say that so significantly has changed because the initial referendum in 2016 it was "no more time a valid basis" for pinpointing Britain's long run and the priority should really be a new general public vote prior to an election.
Opposition leaders have thus far not supported the votes to name a basic election, which wants the help of two thirds of MPs, as a result of they worry it could possibly be used to power via a no-deal Brexit.
"Only Boris Johnson and the Conservatives will deliver Brexit by 31 October, no ifs or buts, so we can move on and focus on the issues that matter to people", said its party chair James Cleverly.
Mr Corbyn threatened to "unleash the biggest people-powered campaign we've ever seen", when addressing union members. "And they are increasingly despairing seeing what's going on in Parliament and the role that the Labour Party is playing, and the fact the Labour Party won't even have an election, frankly they're scratching their heads and wondering what is going on and what is the Labour Party for?"
Mr Corbyn recommitted to a second referendum on Brexit, which he said would include a "credible option to Leave" as well as Remain.
The 59-year-old, who announced on Sunday he would be standing down from the Commons after 18 years representing Bassetlaw, said: "That's not a good recipe for winning a General Election and in the North of England, Labour will pay a huge price". He also appeared to rule out including the option of a no deal Brexit on the ballot paper, claiming that it was not a "realistic offer" as it could be "damaging for the country", the Daily Telegraph reported.
"They want to delay Brexit yet again, without further reference to those who voted for it ... and so now the house will move to adjourn and resume the state opening and the Queen's speech on October 14, and I hope the opposition will use that time to reflect".
While stopping short of calling for that himself, Mr Watson will say it is not too late for Labour to "win back" Remain voters from the Lib Dems if it campaigns "unequivocally" to remain. Mr Austin said: "This is the most hard decision I've ever had to take, but the truth is I'm ashamed of the Labour party".
Its election manifesto will promise to reach a better Brexit deal, but is not expected to commit to either Leave or Remain.
"Prime minister: you can hide from parliament for a few weeks, but when we return we will be ready", Starmer will say.
Joined by non-Labour representatives including Rory Stewart and Norman Lamb, "MPs For A Deal" argue that the "WAB", which MPs never got the chance to vote on, secured some of the concessions Labour had been campaigning for until recently and could gain a Commons majority.