‘When countries all reach the same level of transmission these travel difficulties will stop’

People travelling to Belgium and the Bahamas will now have to go into quarantine when they return to the UK and there are reports today that France could be the next country to go on that list. It's thought there could be as many as half million British tourists currently in France on holiday. But what about those who won't - or simply can't afford - to self isolate? David Heymann is Professor of Infectious Disease Epidemiology at London School of Hygiene and Tropical Medicine, and former chief of the WHO's infectious diseases programme. He told Martha Kearney: "It's a very difficult situation… but I expect when countries all reach the same level of transmission these travel difficulties will stop." He added: "It's very important right now that people understand how they can contribute to this by protecting themselves and protecting others." With Lucy Yardley Professor of Health Psychology at University of Southampton and University of Bristol and Nick Beake, BBC Brussels correspondent. Credit: European Photopress Agency