British Prime Minister Boris Johnson is set to unveil his final Brexit offer to the European Union and make clear that if Brussels does not engage with the proposal, Britain will not negotiate further and will leave on October 31.

In his closing speech to his governing Conservatives’ annual conference on Wednesday, Johnson will stick to his hard line on Brexit, offering the party faithful the first details of what he will describe as his “fair and reasonable compromise”.

With less than a month until Britain is due to leave the EU, the future of Brexit, the country’s biggest trade and foreign policy shift in more than 40 years, is uncertain. Britain could leave with a deal, without one or not exit at all.

Johnson, who says Britain will leave the bloc on October 31 no matter what, will tell the conference he will send his proposal to Brussels, an attempt to secure a deal to smooth the country’s departure and avoid a potentially damaging no-deal Brexit.

“My friends, I am afraid that after three-and-a-half years people are beginning to feel that they are being taken for fools,” he will say, according to extracts released by his office.

Johnson has been firm that the October 31 deadline will be met, but parliament has put roadblocks in his way – passing a law that requires the prime minister to request a Brexit delay if he fails to secure an acceptable deal at an EU summit on October 17.

The EU has repeatedly asked Britain to come up with “legal and operational” proposals for the changes Johnson wants to a deal his predecessor negotiated with the bloc last year.

Following its rejection three times by parliament, Johnson has demanded changes to the Withdrawal Agreement, especially over new arrangements with the bloc for the border between Northern Ireland and EU member Ireland.

But after weeks of talks since Johnson took power that have made little headway to break the Brexit stand-off, the prime minister will make his last gambit – a new proposal which British officials describe as a final offer.

The Telegraph newspaper cited a briefing to European capitals that Britain was suggesting a plan that would leave Northern Ireland in a special relationship with the EU until 2025, after which Belfast would decide whether to remain aligned to the bloc or return to following British rules.

The proposal would be aimed at replacing the so-called backstop – an insurance policy to prevent the return of a hard border on the island of Ireland – that has become the biggest hurdle to securing an agreement with Brussels.

Northern Ireland’s Democratic Unionist party (DUP) is largely “content” with the proposals, the Guardian reported separately, adding that the plan is supported by DUP leader Arlene Foster.

However, EU member Ireland’s Foreign Minister Simon Coveney said the proposals would not provide the basis for a deal with the European Union and are “concerning.”

Johnson has made the gamble that by pressing a hardline position on Brexit he will steal votes from parties such as the Brexit Party led by veteran eurosceptic Nigel Farage at an election, widely expected to come before the end of the year.

Let’s. 👏 Get. 👏 Brexit. 👏 Done.

So we can invest in the NHS, schools and police.

And build a fantastic future for this country.#GetBrexitDone #CPC19 pic.twitter.com/YisunbUkie

— Boris Johnson (@BorisJohnson) September 30, 2019

He also has the main opposition Labour Party in his sights, and will use his speech to attack its leader, Jeremy Corbyn, who has led efforts to try to stop the prime minister taking Britain out of the EU without a deal.

“Can you imagine another three years of this? That is the Corbyn agenda – stay in the EU beyond October 31, paying 1 billion pounds a month for the privilege, followed by years of uncertainty for business and everyone else,” he will say.

“Let’s get Brexit done – we can, we must and we will.”

-AAP