Separate images of UK Prime minister Margaret Thatcher and US President Ronald Reagan both on the telephone
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The ever-changing US-UK 'special relationship'

Donald Trump says he may not have a "very good relationship" with UK Prime Minister David Cameron if he wins the US presidency, since Mr Cameron criticised remarks by the Republican hopeful as "divisive, stupid and wrong".

The 'special relationship' that has existed for more than 60 years between the two countries has played a huge role in shaping world affairs, but which presidents and prime ministers have had the most harmonious correspondence, and which ones have seen some notable rifts?

Produced by Alexi Peristianis; images courtesy of Pathé, Getty

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