variant b11529 is more transmissible than the delta variant and he said one of the lessons of the bat pandemic is that countries must move quickly and at the earliest possible moment, so from midday today six countries on the travel red list and anyone not from the uk or ireland will be denied entry to the uk and any irish residents returning to the uk must enter hotel currency and anyone who has arrived in the last ten days will be contacted by nhs test and trace and he reminded that the pandemic is far from test and trace and he reminded that the pandemic is farfrom over. let s try to get us up to date with what we know and what we don t know at the moment. professor claire bryant is an immunity specialist from the university of cambridge and joins me now. thank you very much for your time today and on the question of what we know and don t know, how has