This is actually a bit more specific than just speculation, as it actually says Downing Street has confirmed that they are working to a target of 1 June, subject to the latest data on infection rates. My big concern is that if Boris Johnson once comes out and announces 1 June, he won't want to backtrack on that date whatever the data says as we approach 1 June. Personally, I think if schools reopen on 1 June in anything other than a very limited way, that will pave the way to a spike in infection rates. It will be very difficult for the government to put out the message that people shouldn't be meeting up with friends if it's happily allowing children to sit close to each other in groups of thirty to a classroom.