The Police, Crime, Sentencing and Courts bill would toughen measures officers can take to disperse demonstrations, such as imposing time and noise limits, which campaigners and activists fear would be used to curb dissent.
On Saturday, climate change group Extinction Rebellion (XR) and the Black Lives Matter (BLM) movement joined other activists for "kill the bill" rallies in London and other towns and cities, including Manchester, Sheffield, Leeds and Brighton.
“Many of my African American friends and supporters have reached out to suggest that we consider changing the date out of respect for this Holiday,” Trump tweeted.