UK coronavirus live: Johnson signals stricter face mask rules and says people should 'go back to work if they can'

News updates: PM says scientific advice on masks has shifted and moves away from work at home' message; Sage scientists say stars should be enlisted for public messages as public has lost trust in government

• Boris Johnson: we need to be stricter on face masks
• Firm linked to Gove and Cummings given Covid-19 contract without open tender
• Wales: pubs and restaurants could reopen indoors in August
• UK air pollution still down despite return to normal traffic
• Global coronavirus updates - live

6.58pm BST

Thank you following the blog today. Below is a summary of the key stories.

6.49pm BST

Our new Commissioner, Andy Byford has been looking at measures underway to make the transport network cleaner than ever

Extensive cleaning regime with hospital-grade cleaning substance

Trial of UV cleaning of escalator hand rails

1,000 hand sanitiser points pic.twitter.com/hVRCKv9Rn2