THERESA May will on Friday launch her vision for the country, a Plan for Britain, that will put strengthening and sustaining the “precious, precious Union” of the United Kingdom at its heart.

The Prime Minister, addressing the Conservative Spring Forum in Cardiff, will tell the party faithful that as Britain leaves the European Union it must seize the moment of opportunity to shape a brighter future for the whole country.

She will say: “Our Plan for Britain is a plan for a brighter future. A plan to make the most of the opportunities ahead and to build a stronger, fairer Britain that is more united and more outward-looking. A plan to get the right deal for Britain abroad, yes, but also a better deal for ordinary, working people here at home.”

In words that echo her rejection of a second independence referendum in Scotland she will say that the over-arching goal of the Plan for Britain will be the creation of a more united nation.

“That Union is more than just a constitutional artefact. It is a Union between all of our citizens, whoever we are and wherever we’re from.

“So our Plan for Britain will put strengthening and sustaining that Union at its heart. It means taking the big decisions when they’re the right ones for Britain in the long term. Putting the national interest above any other consideration.

“And it means ensuring that we act in the interests of the whole country; creating jobs and supporting cities, towns and communities right across our United Kingdom,” she will declare.

Reflecting on last June's referendum result, Mrs May will say that it was not just a vote to leave the European Union but an instruction to change the way Britain works forever. She will say that the vote was a call to change the balance of Britain so that it works for everyone, not just the privileged few.

She will insist that she is determined to get the right deal for Britain abroad, forging a new partnership with friends and allies in Europe but also looking beyond Europe to build relationships with old friends and new allies around the world.

“At the same time, we will pursue the ambitious economic and social reforms we need to make Britain work for working people.

“That means building a stronger economy and investing in the things that will deliver for Britain in the long-term, tackling the problem of low productivity and helping to secure the high-paid, high-skilled jobs of the future.”

She will explain how her Plan for Britain will seek to create a fairer society by breaking down the barriers of privilege and spread opportunity and prosperity around the country.

“It means forging a more united nation, as we put the values of fairness, responsibility and citizenship at the heart of everything we do, and we strengthen the bonds of our precious Union too.

“It means building a stronger, fairer Britain that our children and grandchildren will be proud to call home.”

Looking ahead to the EU negotiations the PM will say the coming negotiations with the EU will be vital for everyone in the United Kingdom; “every person, every family, every business, every community the length and breadth of the United Kingdom; England, Scotland, Wales and Northern Ireland”.

She will insist that the country needs to approach the talks as “united, as one United Kingdom, all pulling together to get the best outcome,” explaining: “That is what we have always done when faced with challenges. We have pulled together as one and succeeded together.

“We are four nations but, at heart, we are one people. And I will always ensure the voices and interests of England, Scotland, Wales and Northern Ireland are represented as we negotiate to leave the EU.

“And I will always fight to strengthen and sustain this precious, precious Union.”