I think it will have two prongs: restarting the economy, and lifting social restrictions a little bit so as to avoid mass mutiny.
So encouraging industry to re-start, eg construction sites, factories (and trying to mitigate the risks of public transport, possibly recommending masks).
And as experts have said that outdoor interaction is low risk, then allowing people to play sports, have picnics but perhaps with only your household, or sports with only 2 people, eg tennis.
I don't think Boris will want to offend the Conservative heartlands in the countryside by allowing people to go for days out there, sadly. Even though walking outdoors has a miniscule risk of infection.
Small shops might be in the next phase in a few weeks. That's my guess. And schools phasing in from 1st June, but they might not announce that yet (headteachers have said they need 3 weeks notice).