UK PM May warns: It is my deal, no deal or no Brexit

British Prime Minister Theresa May told lawmakers on Thursday that their choice was clear: back her Brexit deal, leave with no deal, or have no Brexit at all.

"The choice is clear: We can choose to leave with no deal, we can risk no Brexit at all, or we can choose to unite and support the best deal that can be negotiated," May told parliament in a statement on Thursday.

May said she shared the concerns of those who believe a Brexit backstop to avoid a border on the island of Ireland impinges on British sovereignty, but it was an improvement on previous proposals.

"The references to the backstop do raise some difficult issues," May told parliament.

"I fully accept that across the house, there are concerns in relation to the backstop. Indeed, I share some of those concerns," she said.

May said on Thursday the government was continuing to prepare for a no-deal Brexit after her draft divorce deal sparked a raft of ministerial resignations.

"We have been preparing for no-deal and we continue to prepare for no-deal because I recognise that we have a futher stage of negotiation with the European council and then that deal when finalised ... has to come back to this House," she told parliament.

Britain will leave the European Union on March 29 and will not suspend the process of leaving, Prime Minister Theresa May said on Thursday, adding that it would meet its legal obligations on a financial settlement with the bloc.

"We will not extend Article 50," May told parliament, when asked about the clause in the EU's Lisbon Treaty which allows for countries to leave the bloc.