Citigroup is expanding a Covid-19 testing programme for its Canary Wharf headquarters in a bid to get more employees back in the office, as City investment banks gradually reopen after the latest UK lockdown.

More UK staff will return to Citi's Canary Wharf headquarters from 12 April as the bank expands a pilot Covid-19 testing from around 1,000 eligible employees, people familiar with the matter said.