DUP chief Sir Jeffrey Donaldson is ready to make an enormous supply to the Government so long as it's keen to undo its greatest Brexit mistake.

Express.co.uk has seen an extract of a significant speech tomorrow by the chief of Northern Ireland's greatest protestant celebration which opens the door to long-delayed energy sharing.

But the situation can be to tackle the EU and assure Northern Ireland's place within the UK single market.

The speech will come at an occasion hosted by the Centre for Brexit Policy (CBP) assume tank which is because of unveil a complete report on Northern Ireland and the EU's energy seize.

The report, supported by Sir Jeffrey, is ready to recommend a checking system "mutual" the place the UK and EU agree to make sure that merchandise coming from their sides meet one another rules and compliance guidelines.

The system will imply that there isn't a longer a necessity for borders throughout the Irish Sea between Northern Ireland and the UK mainland.

The CBP is supported by senior Brexiteer MPs together with former Conservative chief Sir Iain Duncan Smith and former Brexit minister David Jones, who's at present deputy chairman of the European Research Group (ERG) of Tory Brexiteer MPs.

In his speech, Sir Jeffrey will say: "We want to restore the Northern Ireland Assembly on a basis that unionists, as well as nationalists, can support.

"We want steady and sustainable devolved authorities. Northern Ireland is a divided society. We should get the foundations proper."

But he will warn: "Progress is simply made in Northern Ireland based mostly on consensus. For those that have forgotten, political progress in Northern Ireland was onerous gained and is constructed on the assist of unionists and nationalists."

In a direct challenge to Rishi Sunak's Windsor Framework Agreement and Protocol, he will note: "Not one unionist MLA supported the Protocol, that was the important mistake.

"There is no solid basis for an Executive and Assembly until we have arrangements that protect NI’s place in the UK internal market and our constitutional arrangements are respected.

"Thus we'll proceed to interact with the UK Government within the brief time period to safe the required circumstances for a return to Stormont.

"We welcome the publication of this report by the Centre for Brexit Policy as an vital contribution to the talk on future preparations with the EU.

"We have been clear all through that the idea of mutual enforcement is worthy of significant consideration by way of delivering a long run resolution."

He will add: The goal of the DUP stays that of restoring and defending Northern Ireland’s rightful place within the UK Internal Market and to future proof this in opposition to potential divergence from the legal guidelines that regulate that inside market.”