Theresa May has offered to involve Scotland, Wales and Northern Ireland in formal talks on the Brexit process to ease concerns about her handling of the upcoming negotiations.
Downing Street said May will tell the leaders of the devolved countries - who are concerned about the implications of a possible hard Brexit - that her final strategy has not yet been decided.
The Prime Minister is due to meet Scottish First Minister Nicola Sturgeon, Welsh counterpart Carwyn Jones and Northern Ireland's leader Arlene Foster and her deputy Martin McGuinness in Downing Street to address these concerns.
Scotland, Wales, and Northern Ireland are keen to secure continued participation in the single market and have expressed the desire for a vote on Theresa May's approach before she triggers Article 50, formally beginning the Brexit process.
The Prime Minister has offered a "direct line" to Brexit Secretary David Davis, who is set to chair a new forum bringing together representatives of Westminster, Holyrood, Cardiff Bay and Stormont for regular talks on the situation.
She said: "I am determined that as we make a success of our exit from the European Union, we in turn further strengthen our own enduring union.
"The great union between us has been the cornerstone of our prosperity in the past - and it is absolutely vital to our success in the future.
"The country is facing a negotiation of tremendous importance and it is imperative that the devolved administrations play their part in making it work.
"The new forum I am offering will be the chance for them all to put forward their proposals on how to seize the opportunities presented by Brexit and deliver the democratic decision expressed by the people of the UK."