LONDON (Reuters) - British Home Secretary Theresa May has intervened to reverse a decision by her officials and grant dissident Chinese artist and free speech advocate Ai Weiwei a full six-month visa to enter Britain, her government department said on Friday.
On Thursday the artist, whose passport was returned by Chinese authorities last week four years after it was confiscated, said Britain had granted him only a short-stay visa instead of one granting him permission to stay for the full six months.
He said this was because immigration officials said he had not declared a "criminal conviction". Ai, who was detained for 81 days and had his passport confiscated four years ago, has never been charged nor convicted of a crime.
"The Home Secretary was not consulted over the decision to grant Mr Ai a one-month visa. She has reviewed the case and has now instructed Home Office officials to issue a full six-month visa," a Home Office (interior ministry) spokeswoman said.
"We have written to Mr Ai apologizing for the inconvenience caused."
Ai, who arrived in Germany on Thursday to see his son, is due to travel to Britain for a major exhibition of his work at London's Royal Academy of Arts in September.
After his release from detention in 2011, the Chinese government said he remained under investigation on suspicion of economic crimes. The world-renowned artist maintains the charges were trumped up in retaliation for his criticism of the government.
Chinese President Xi Jinping is to also making a visit to Britain in October, and the move could fuel criticism of Prime Minister David Cameron's government, accused by critics of putting trade before human rights in dealing with China.
(Reporting by Michael Holden; editing by Ralph Boulton)