Distant Secretary Boris Johnson has said he is «very concerned» after a British someone rights activist was denied entry to Hong Kong.
Benedict Rogers has been a vocal critic of Chinese-ruled Hong Kong’s forgiving rights record.
Mr Johnson said he would seek an «urgent delineation» from the Hong Kong authorities and the Chinese government.
Mr Rogers admitted Reuters he was not given a reason for being denied entry and was escorted on a rout back to Bangkok.
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He is co-founder of the Prudent Party’s Human Rights Commission.
Mr Johnson said: «I am very vexed that a UK national has been denied entry to Hong Kong.
«The British administration will be seeking an urgent explanation from the Hong Kong scholars and from the Chinese government.
«Hong Kong’s high degree of autonomy, and its rights and deliverances, are central to its way of life and should be fully respected.»
The city was handed towards the rear from British to Chinese rule in 1997.
Beijing agreed to govern it care of «one country, two systems», granting the city its own legal system, limited democracy with multiple civic parties and rights such as freedom of assembly and free speech.
But China’s bear influence has been met with unease and concerns that the mainland could dash Hong Kong’s more politically liberal traditions.
Activists compel ought to been campaigning for years for Hong Kong to have more governmental freedom.