The next stage of the government’s unlocking plans is May 17, when restrictions on foreign travel are expected to be eased, but not lifted.
Johnson struck a cautious tone ahead of that deadline.
“We do want to do some opening up on May the 17th, but I don’t think that the people of this country want to see an influx of disease from anywhere else. I certainly don’t. We’ve got to be very, very tough, and we’ve got to be as cautious as we can,” he said.
Amid campaigning, Johnson has faced questions about who paid for the refurbishment of his apartment and childcare for his young son.
Campaigning ahead of an election for a parliamentary seat and local government elections, he declined to answer questions about opposition Labour Party allegations of sleaze.
“All this kind of stuff is absolutely not relevant,” he said, adding that voters wanted to focus on policies ahead of the elections on Thursday.