With two thirds of all British Covid deaths coming after September 2020, Dispatches investigates why, and examines what role the Prime Minister's decisions of last Autumn played in there being a massive second surge in infections that saw tens of thousands of people die. As Boris Johnson's former chief advisor Dominic Cummings threatens to reveal all, reporter Antony Barnett hears from some at the heart of Downing Street discussions, and learns why the Prime Minister ignored government scientific advice and continued to battle against another lockdown. Dispatches also probes the Prime Minister's border plans to stop virus variants coming into the UK and hears from a whistleblower who fears they've failed to do the job.