The plan for easing lockdown in England has been announced by the Prime Minister in the House of Commons.
Secondary school pupils will be required to wear face coverings in classrooms and shared spaces like corridors.
The second step from 12 April would see major parts of the economy permitted to reopen:
But wider social contact rules will continue to apply in all settings - meaning no indoor mixing between different households will be allowed.
Mr Johnson confirmed the end of hospitality curfews - and requirements to eat a substantial meal alongside alcohol.
Funerals continue with up to 30 people, and weddings with up to 15 guests.
The third step will come from 17 May - if the data allows - and will see the "rule of six" abolished for outdoor gatherings, replaced with a limit of 30 people:
Up to 30 people will be able to attend weddings, receptions, funerals and wakes.
The fourth step from 21 June will potentially see all legal limits on social contact removed, with the final closed sectors of the economy reopened - such as nightclubs.
The government hopes that - from this date - restrictions on weddings and funerals will also be abolished.