There's only really been one measure lifted. We can go out for the day and not just for exercise.
The people being encouraged to go back to work could always work.
There has never been a limit to the amount of time you could exercise and the amount of times you went out was just in the guidelines, it wasn't enforceable. The hour rule was a load of nonsense spouted about here and there, it was never mentioned in any government guidance.
Same with driving somewhere to exercise. That was allowed too. Only now you dont have to exercise more than driving.
Schools going back isn't for another 2 weeks at the earliest so 3 weeks since the last announcement. Plus if the unions (not necessarily the teachers) get their way it wont be for a bit longer anyway.
Also as PP have said our cases aren't going down as fast because we are testing more and more people all the time. The percentage of postive Vs negatives has changed I assume. Not anything I've seen, but simple maths. Test 30 thousand people and get 4 thousand positives is 13.3333333% positive. Test 100 thousand people and get 4 thousand positive is 4% positive.
This virus is going nowhere not unless there's a cure or a vaccine. There are other things to consider. OK so I'm not saying we should all go back to normal now, but I really can't see why we should stay in lockdown a few more weeks