Covid-19: Lockdown restrictions could relax once 'top 4 cohorts' vaccinated

The government said that the UK could begin to reopen from the beginning of March, once the top 4 risk groups are protected from Covid-19.

But Vaccine Deployment Minister Nadhim Zahawi told the BBC that there were still a "number of caveats" to reopening, and that we don't yet know the impact vaccination has on the transmission of the virus.