The story of the Aussie doctor in WHO’s COVID-19 mission to China

Professor Dominic Dwyer is the Australian scientist tasked, in the words of the ABC, with “answering one of the most politically sensitive questions in the world”.
The microbiologist and infectious diseases physician was part of the 10-member team which has just returned from China after four weeks attempting to trace the origin of SARS-CoV-2
Was the virus, as some allege, leaked from a lab in Wuhan?
But given the stakes, how much freedom was Professor Dwyer and his colleagues really allowed by the Chinese state authorities?