Veteran broadcaster John Humphrys almost caused a diplomatic incident on the BBC Today show, angering the Mexican Embassy.A letter of protest arrived on his desk at BBC Radio 4 after those in the embassy misheard something he said on the programme.They thought he said he had used the phrase “Mexican standards” to describe shoddy building practices.However, he had actually said “Mexican stand-off”.Mr Humphrys jokingly compared himself to Donald Trump after the incident.In his column in Waitrose Weekend magazine yesterday, Humphrys, who also presents Mastermind on BBC Two, wrote: “President Trump has outraged Mexico with his wall plans and for one nasty moment recently I feared I might have done the same.”A letter arrived from the acting ambassador complaining about my references to Mexicans. Apparently I had used the expression ‘Mexican standards’ to describe shoddy building practices.”Serious stuff. Except I hadn’t. In a swift follow-up he acknowledged the phrase I had actually used, referring to a dispute between the builders and customers, was ‘Mexican stand-off’. “Crisis averted. Over to you Mr Trump.” Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.