Brits who fail to self-isolate will soon be hit with £10,000, Boris Johnson has announced amid rising concern at the spike in coronavirus infections.
Another 4,422 new Covid-19 cases were recorded overnight, marking the highest daily rise in infections since May 8.
It comes as Sadiq Khan warned that London should be placed under new lockdown restrictions as early as Monday to stop a surge in cases.
Meanwhile, Labour leader Sir Keir Starmer has called on the Government to entrust coronavirus testing to local authorities who have a comprehensive understanding of their communities.