PM to trigger Brexit by March

British Prime Minister Theresa May will trigger the divorce process from the European Union by the end of March, firing the starting gun on the country's biggest shift in policy since World War II.

May, appointed prime minister shortly after Britain voted in June to leave the bloc, has been under pressure from EU officials, investors and members of her Conservative Party to offer more on her plan for Britain's exit, beyond her catch phrase "Brexit means Brexit".

In an interview with the BBC, May for the first time confirmed what many expected - that she will trigger Article 50 of the EU's Lisbon Treaty before the end of March next year.

The formal divorce process gives Britain up to two years to negotiate its exit from the bloc.

Asked whether her government would prioritize immigration over access to tariff-free trade with EU countries in divorce talks with the bloc - something that has muted investment, May said only that she wanted to get the "right deal".

"I want the right deal for trade in goods and services and what we are doing at the moment ... is listening to businesses here in the UK, listening to different sectors, finding out what it is that is most important to them," she said.

To get the right deal, May was clear that she must keep her cards close to her chest, saying she would not give a "running commentary" on her negotiation or give her position away.

May, who was appointed after her predecessor David Cameron resigned following the June referendum, also ruled out an early parliamentary election, saying on the weekend that it would cause "instability" - which has also dampened investment since the referendum.

Separately, her Brexit minister David Davis said in a statement that EU law would be transposed into British law on the day Britain formally left the European Union. Laws that were then deemed unnecessary would be repealed by parliament subsequently.

Speaking on the first day of her party's annual conference on Sunday, May hoped to put some of the criticism to rest by pledging to overturn the 1972 European Communities Act, the law allowed the accession of Britain to the European Economic Community, which later became the European Union.

May said that the repeal would take legal effect the moment the UK formally pulled out. Then the European Court of Justice (ECJ) would no longer be able to deliver judgments binding on Britain, she told the newspaper.

The ECJ came under fire from many of those who campaigned to leave the European Union before the June referendum, with the official "Vote Leave" group saying Britain lost most of its cases to the court, which it called an "injustice".