The director general, Tim Davie, said the BBC “should be able to do its reporting without fear or favour” and that “media freedom matters”.
In a statement posted on Twitter, Davie warned of “significant and growing global threats to the free media”, adding that some countries were trying to “increase their control of information”.
“It is of deep concern when our journalists are restricted and their work curtailed. Importantly, in these difficult times when misinformation is rife, we have seen growing audiences for trusted news sources – including hundreds of millions coming to the BBC.
“Now, more than ever, it is important that we speak out to defend free and fair journalism,” he added.
The statement came in response to growing tensions between the UK and China over media freedom.
At midnight Beijing time on Friday, China announced a ban on the broadcast of BBC World News over “serious content violations”, accusing the service of violating requirements to be true and impartial. The National Radio and Television Administration (NRTA) also said the broadcaster had undermined China’s national interests and “ethnic solidarity”.
In Hong Kong, the public broadcaster RTHK will also stop broadcasting the BBC World Service to listeners, reports suggest.
The ban appeared to mark a tit-for-tat response to the decision to strip China’s state broadcaster of its UK licence on Thursday.
Ofcom decided to retract the broadcasting licence of China Global Television Network, ruling thebroadcaster was ultimately controlled by the Chinese Communist party and thus violated UK broadcasting laws.
Earlier in the week, the British foreign secretary, Dominic Raab, also criticised China’s decision to ban BBC World News, calling it an “unacceptable curtailing of media freedom”.
“China has some of the most severe restrictions on media and internet freedoms across the globe, and this latest step will only damage China’s reputation in the eyes of the world,” he said in a tweet on Thursday.
The European Union has also joined a chorus of criticism over the move, calling on China to reverse the decision.
This is not the first time China has been critical of the BBC’s coverage, previously attacking the broadcaster’s reporting on the coronavirus pandemic and human rights abuses against the Uighur minority in Xinjiang.