Theresa May will demand a strict limit on immigration when she negotiates Britain's exit from the European Union, her allies have said.

Senior Tory sources claim that Mrs May, who will be appointed Prime Minister by the Queen today, will make ending freedom of movement her priority.

She is also reportedly determined to see UK law gain supremacy over the EU's Court of Justice.

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Theresa May will demand a strict limit on immigration when she negotiates Britain's exit from the European Union, her allies have said

A source close to the Tory leader told the Express: 'The clear message from the EU referendum was that people want us to get back control of our borders. Theresa is absolutely determined to do that.'

Mrs May has been attempting to reduce immigration to the tens of thousands in her role as Home Secretary and her allies claim she will now push for this target with vigour.

'She understands that the British people really want this sorted out,' one ally told the Express.

The source added that Mrs May will not rush to trigger article 50 of the EU's Lisbon Treaty because of her desire to secure the right deal that crucially includes curbs on immigration.

She will be happy to negotiate the UK's trading relationship with the EU 'step by step' but will reportedly want to tackle immigration and border control from the very start of talks with Brussels.

Senior Tory sources claim that Mrs May, who will be appointed as Britain's Prime Minister by the Queen today, will make ending freedom of movement her number priority

A spokesman for Theresa May outlined her commitment to Brexit: 'Civil servants have already been charged with finding a building to house the Brexit department - an indication of Theresa's commitment to get on with delivering the verdict of EU referendum.

'Brexit means Brexit and we're going to make a success of it,' the spokesman said.

Yesterday, Mrs May told Tory Party staff: 'Now, more than ever, we need to work together, to deliver on Brexit, to build a country that works for everyone, and to truly unite our Party and our country.'

'The Labour Party brought our country to the brink of bankruptcy and we can never let them do it again.

'Whether it's led by Tony Blair, Gordon Brown or Jeremy Corbyn, when Labour prospers the country suffers.

'So let's make sure they don't prosper. Let us redouble our efforts.

Top team: Justine Greening (left) and Brexit backer Priti Patel (right) are also tipped for promotions. Mrs May’s aides said ‘she has always believed that there should be more women in prominent government positions’

'And let us make sure we put this time to good use, to build the support we need to go to the country in four years' time, and not just win, but win big.'

The claims over Mrs May's stance on immigration come as speculation mounts over who she will chose to attend her Cabinet.

The combative Amber Rudd is tipped for one of the great offices of state and could replace Mrs May in the Home Office or even move into the Treasury.

Justine Greening and Priti Patel – a senior figure in the Brexit campaign – are also tipped for promotions. Mrs May's aides said 'she has always believed that there should be more women in prominent government positions'.