Guardian photojournalist Sean Smith has been out late at night throughout the pandemic with the people who work daily deep cleaning and decontaminating the capital’s public transport system
In many ways, England’s second national lockdown was very different to the first. Schools stayed open, care home visits were allowed, elite sport continued, and people were allowed to socialise outdoors with a member of another household. What remained unchanged, however, was the essential nature of different streams of the country’s workforce, many of whom are not always prominent in the public eye.