Has protest evolved to become unpoliceable?

On this episode of 'Tonight with Andrew Marr', Andrew is joined by Former Tory Home Secretary Sir James Clevely; Labour MP for Portsmouth North, Amanda Martin; Chief Executive of the Confederation of British Industry, Rain Newton-Smith; Economist at Deutsche Bank, Sanjay Raja; Exchequer Secretary to the Treasury, Dan Tomlinson, and LBC Presenter and Channel 4's Europe Editor, Matt Frei.