Britain has called in an international war negotiator to counter growing hostility between Brussels and London over Brexit.

Government officials have met with a leading US negotiator for help after he played a key role in ending the seemingly intractable 52 year-long war in Colombia, South America.

William Ury specialises in hostile and emotional conflicts and advises parties on how to turn the other side's anger against them.

The Brexit war of words started to heat up between Theresa May and her EU counterparts over the past week.

A leaked report of a Downing Street dinner with European Commission president Jean-Claude Juncker suggested he accused Mrs May of living in "another galaxy".

The Prime Minister responded by accusing EU diplomats of trying to affect the result of the British General Election.