Professor Sophie Harman, Professor of International Politics at Queen Mary spoke to BBC Radio 2 about minimising the risk of spreading Covid and how stricter border controls have worked for some countries. She said: "New Zealand and Australia did it and it benefited them in terms of minimising the risk of infection from those coming from outside of the country. So it really raises the question, was this advice around borders coming from the World Health Organisation effective and it did it harm those countries that didn't close borders?" Radio clip available on request
This was covered on BBC Radio 2, BBC London, BBC News at Ten