Mr Corbyn's comments came as a cross-party groups of MPs said there was still time to pass a Brexit deal in Parliament with a "sizeable voice building across the House" to be given the opportunity to achieve it.
Acutely aware that the eurozone remains economically sluggish with sky-high unemployment, that tensions with the Polish, Romanian and Italian governments are growing and, in France's case, that its own privatisation project and attacks on workers' rights have led to widespread and incendiary resentment, some see Britain's never-ending Brexit saga as a source of further destabilisation they could do without.
His stance contrasts with Jeremy Corbyn's insistence on Tuesday that any referendum must include a "credible leave option", leaving the door open for Brexit voters to support Labour.
Addressing the annual Trades Union Congress conference, Mr Corbyn said he would reverse the "deliberate, decades-long transfer of power away from working people". "We're ready to unleash the biggest people-powered campaign we've ever seen".
Parliament will vote Monday evening on whether to hold a general election, before being suspended for five weeks into mid-October.
But Mr Johnson later dismissed as a "load of nonsense" accusations that suspending Parliament is "anti-democratic", insisting it was necessary to prorogue before the Queen's Speech.
"All Labour offer is more dither and pointless delay - costing our country £250 million a week, which we would rather spend on what matters to the public, like the NHS".
But the only way to break the Brexit deadlock once and for all is a public vote in a referendum.
Having said that, Mr Watson will argue it is not also late for Labour to win back again Stay voters place off by confusion about the party's position on Brexit, if they were to dedicate evidently to campaign to stay in the EU.
"No one can trust the word of a Prime Minister who is threatening to break the law to force through no deal".
"It will put us at the mercy of Trump and the big United States corporations itching to get their teeth further into our NHS, sound the death knell for our steel industry, and permanently drive down rights and protections for workers".
These included continued customs union membership until the question of whether to leave could be settled at a general election; and closer alignment with the EU on workers' rights and environmental standards.
"We will deserve all the ridicule we get if this is the manifesto. That is what the overwhelming majority of Labour party members, MPs and trade unions believe".
Last night, Vaughan Gething took to Twitter to say that the ambiguous position would hurt the party going into an expected General Election in October or November.