MPs have launched an inquiry into detention camps in China's Xinjiang province, likening them to the Nazi genocide of the Second World War.
The Commons foreign affairs committee launched the investigationon Wednesday with a view to learning how to discourage private sector companies from contributing to human rights abuses of the mostly Muslim Uighur people.
Tom Tugendhat, the committee chairman, said there was "undeniable evidence of the persecution of more than one million people in these so-called re-education camps".
Writing in The Telegraph, Mr Tugendhat said "the mass detention of Uighurs in Xinjiang" had "horrifying echoes of the 1930s" and there were "credible reports of physical abuse, forced sterilisation, filthy living conditions and a state-led programme of indoctrination".
He added that a "range of private sector companies" were facilitating the persecution and warned that "the reputation of British business is at stake".
The Telegraph can reveal that the Conservative MP Nus Ghani will also be leading an inquiry with the business, energy and industrial strategy committee, exploring how it can address the UK Uighur supply chain.
Ms Ghani said: "This is an atrocity. It is the most modern form of human rights abuses on a mass scale.
"So many basic products come out of China, and this is going to be a major problem for businesses, but we all know what's happened to the Uighur people and we will be looking at how UK companies audit their supply chain and how transparent they are about it."
Earlier this week, the US blocked exports from the region, including garments, cotton, computer parts and hair products from five entities in Xinjiang and Anhui provinces.
China has long suspected the Uighurs of harbouring separatist tendencies because of their distinct culture, language and religion.
Earlier this month, it was announced that the barrister Geoffrey Nice, who led the prosecution of the ex-Serbian president Slobodan Milosevic, will be leading an independent tribunal looking at whether the Chinese government's alleged abuses constitute genocide or crimes against humanity.
Sir Iain Duncan Smith, the co-founder of the Inter-Parliamentary Alliance on China, an international body of 17 countries campaigning to stop abuses of the Uighur community, said he welcomed "any inquiry into the behaviour of the Chinese government, particularly with regards to the Uighur community".
"I am convinced that they are performing the systematic eradication of the Uighur people," Sir Iain said. "These are the greatest of breaches of human rights law that I have seen anywhere in modern times.
"I suspect if any other country had done this the world would have publicly shunned them, but because so many are economically linked to China too many businesses and politicians turn a blind eye to what is going on. This has to stop now."
The Chinese ambassador to the UK, Liu Xiaoming, has previously called allegations about human rights abuses in Xinjiang "lies of the century".