The government says its decisions on Covid-19 have been guided by science. Jane Corbin investigates the policies pursued by governments elsewhere, using data to discover whether anyone got it right.

Panorama investigates the scandal of our polluted rivers. Reporter Joe Crowley obtains data that reveals how some big water companies have been illegally dumping untreated sewage. He meets local people campaigning for a wholescale clean-up and exposes one company discharging sewage without a permit.