UK hasn’t made much noise about this. Either the Chinese has evidence that they haven’t released publicly yet or the British is loath to take a stand on HK. Maybe both. Not surprising with Boris needing all the leverage he can get.
Could someone clarify.... was he detained at the West Kowloon station? Meaning, under Hong Kong soil?
He was detained at border control in West Kowloon. There is no border control up until West Kowloon so he was still under Chinese jurisdiction.