Hong Kong national security law: media tycoon Jimmy Lai sent back behind bars as top court allows prosecutors to appeal against release on HK$10 million bail

• Beyond bail issue for Lai, 73, case has put the spotlight on extent of power and jurisdiction of the Court of Final Appeal under city’s mini-constitution
• Panel of three judges suggests a lower court’s decision to let tycoon out on bail was wrongly based on a misinterpretation of national security law