Nothing has really changed since the start of lock down in terms of vaccines, testing etc
That was never the plan. It was all about buying some time for the NHS to get prepared. There was never going to be a vaccine nor widespread testing, not even in 3 months, let alone 3 weeks.
It's hammered home to people the need for social distancing, better personal hygiene, avoiding large cramped gatherings, etc. So that when restrictions are relaxed, it has to be hoped that most sensible people carry on with sensible precautions for the forthcoming months, to try to keep the spread as slow/controlled as possible.
As the months pass, it's also to be hoped that the medics find better ways of treating it, so that people who catch it are less likely to die. And also that the number crunchers can work on the statistics to come up with better figures as to who are the groups (sex, race, age, health condition etc) most at risk so that they can be shielded, and those more likely to survive can come out of shielding.
We're in this for the long term. Big gatherings like sports, music festivals, etc are at least a year away. We'll probably see schools open this Summer, together with more shops, but it's going to be a very slow process.
Until there's a vaccine, things aren't going to get back anywhere near normal.