I have read about that bill. This bill is quite controversial for a number of reasons, and in the interest of avoiding hyperbole, I'll rely on the text of the bill itself to explain the basic premise of people's upset which has led to these protests. The particular section at biggest issue, as far as I understand, is the segment on Revision 59 of the Police, Crime, Sentencing and Courts Bill to the existing act (text of the bill here), located on page 63. The bill aims to make the following changes to existing laws regarding the policing of protests. Essentially, the bill gives the authority to the police to determine that, if a protester is causing something nebulously defined as "serious annoyance" or "serious inconvenience" to individuals during the course of a protest, they can potentially be imprisoned up to ten years. As one might expect due to the nature of protest itself, the point is... well, to cause an inconvenience or annoyance for the purposes of enacting change