The latest priority seems to be getting schools back in September. To do that, the transmission rate needs to be brought right down. Some scientists are suggesting the infection rate should be no more than one in a million, which is achievable if everybody (and I mean everybody) did their bit.
If the number of infections is tiny, isolated cases could be dealt with and community transmission could be avoided. I think this should have happened weeks ago.
If the infection rate isn't brought down quickly, schools won't remain open for long. Children will become super spreaders, more people than necessary will die and we'll be back to the kind of mortality rate we had in April.
I can't find a reliable source that the plan is to "lockdown" over 50s and suspect it could be a "dead cat" to divert attention from the latest Tory MP to be arrested.
It would be interesting to know what the rationale of shielding over 50s would be.
Personally, I'm not bothered. I've been out - very briefly - three time since March and have no intention of going anywhere until it's safe to do so (which it isn't).