Void the 1 sided extradition treaty
If I commit a crime in Hong Kong, then I should be prosecuted in Hong Kong and not extradited to China.
People get upset about that
Yet in the UK we kowtow to Washington and extradite our citizens to their inhumane rape prisons. This guy seems like a terrible person and it seems he is rightly in court, but he is rightly in a British court facing a British prison.