Transport Secretary Grant Shapps has said everyone travelling on public transport in England will be required to wear a face covering from June 15.
The Government has announced the change,which it says will help contain the spread of the virus as people begin to return to work in greater numbers later this month.
Travellers could be fined or refused permission to board buses or trains if they refuse to comply with the order. In May, the government advised the public to wear DIY face masks for some shopping and using public transport.
London Mayor Sadiq Khan previously called for face masks to be made compulsory. At the Downing Street press conference Mr Shapps said: "I can announce that as of Monday June 15 face coverings will become