A former employee of the UK's Hong Kong consulate has told the BBC that he was tortured in China and accused of inciting political unrest in the city.

Simon Cheng, a Hong Kong citizen who worked for the UK government for almost two years, was detained for 15 days on a trip to mainland China in August.

"I was shackled, blindfolded and hooded," the 29-year-old tells me.

UK government sources say they believe his claims - of being beaten and forced to sign confessions - are credible.

Following our interview, the British Foreign Secretary Dominic Raab has now summoned the Chinese ambassador.

"We are outraged by the disgraceful mistreatment that Mr Cheng faced when he was in detention in mainland China... and we've made clear that we expect the Chinese authorities to review and hold to account those responsible," Mr Raab told the BBC.

The Chinese authorities have not responded to the BBC's request for comment, although state media have previously suggested that Mr Cheng was detained for soliciting a prostitute.

His account now challenges that version of events and raises questions for both the Chinese and the UK governments.

BBC