From the Olympics to Euro 2020, the world’s biggest sporting events have fallen like dominoes because of coronavirus. But as the global pandemic was declared and most European countries closed their sports stadiums, the UK allowed events to carry on with hundreds of thousands of fans coming together to watch everything from Champions League football to the Cheltenham Gold Cup. File on 4 casts a forensic eye over the decisions that were made before the UK went into lockdown, speaks to those at the heart of these big events and asks whether allowing them to go ahead, enabled the virus to spread and put more lives at risk. Reporter: Adrian Goldberg Producer: Mick Tucker Editor: Carl Johnston