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Barack Obama and Theresa May began their own 'special relationship as they shared a 'warm' 15-minute phone call.
The US President rang to congratulate her on becoming Britain's second female Prime Minister yesterday afternoon.
Pair - Importance - Relationship - Britain - US
The pair discussed the importance of sustaining the 'special relationship' between Britain and the US and Mrs May told the President she would pursue 'constructive and positive talks' with European leaders over the details of Brexit.
But she did not discuss the prospects of the UK securing a trade deal with the US - a thorny subject given Mr Obama warned in April that Britain would be at the 'back of the queue' for striking a trade deal if it left the EU.
Commission - President - Jean-Claude - Juncker - Britain
European Commission President Jean-Claude Juncker also phoned Britain's new premier to congratulate her.
The pair's relationship could be key in the upcoming Brexit negotiations but their call yesterday did not go into specifics.
Mr - Juncker - Mongolia - Summit - Pressure
Mr Juncker, speaking from Mongolia during an EU-Asem summit, is under pressure to quit for failing to prevent Britain from leaving the EU, his handling of the EU's response to the refugee crisis and the Greek debt crisis.
Mrs May told Mr Juncker she wanted to continue working closely with the commission on EU issues as well as British withdrawal from the union.
Prime - Minister - Britain - Time - Negotiations
The Prime Minister explained that Britain would need some time to prepare for the negotiations on how Brexit would be achieved.
Mrs May also spoke to Italian prime minister Matteo Renzi and the First Minister of Northern Ireland Arlene Foster.
Evening - Mrs - May - Congratulatory - Phone
On her first evening in No 10 Mrs May took congratulatory phone calls from German Chancellor Angela Merkel, French President Francois Hollande
Today Mrs May is planning to travel to Edinburgh to meet First Minister Nicola Sturgeon.
Sign - Importance - PM
It is a sign of the importance the new PM is placing...
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