Major construction firms are warning that keeping sites open in the coming weeks might not be as straightforward as previous lockdowns.

On Monday evening, Boris Johnson put England into another national lockdown – the third in just over nine months – to deal with the emergence of a new variant of covid-19 which the government’s scientists have found to be 50% to 70% more infectious. Construction was again spared the prime minister’s stay at home order with sites told to carry on working.

…