He did not end the lockdown, he relaxed it. The strict lockdown was breaking down in any case, so some relaxation was inevitable.
From the Evening Standard :
https://www.standard.co.uk/news/uk/coronavirus-uk-live-updates-latest-death-toll-lockdown-a4442976.html
"Boris Johnson’s administration is right to start reopening schools, former Labour prime minister Tony Blair has said.
The Government’s plans to start sending children back to school next month has come under attack from teaching unions and some local authorities, with critics arguing it is too soon to lift the coronavirus-related lockdown restrictions.
In an interview with BBC Newsnight, due to be broadcast on Monday evening, the PM of 10 years said the Government was adhering to scientific advice by preparing schools to open their doors again.
“They’re right, I think, to be reopening the schools,” said Mr Blair.
“I don’t think they would say that they’re putting school opening above health risks. What they’re doing is basing it on the evidence, actually.
“There are countries that have reopened parts, at least, of their school system.”"
Originally Posted by: Maunder Minimum