After hundreds of protesters started a quiet and peaceful sit-in in Hong Kong's political centre on Friday morning, their actions escalated gradually from about 11am and continued into the night, with thousands around the police headquarters in Wan Chai. Demonstrators in black T-shirts and masks earlier spilled onto Harcourt Road, the thoroughfare between Admiralty and Central, setting up roadblocks and trapping vehicles. They were calling for – among other demands – the full withdrawal of the controversial extradition legislation, which the government suspended last week. You can see how it played out below.