The thing is, what the UK is doing is truely experimental compared to what China, SK, and Italy have already done. And we won't know for sure what the full effe

The thing is, what the UK is doing is truely experimental compared to what China, SK, and Italy have already done. And we won't know for sure what the full effects are until the end of the current pandemic. If the UK copied the lockdown and trace playbook already implemented, once this pandemic is over we'll have no data point for the quarantine old people only strategy to plan for the next pandemic with. How can you observe whether the UK strategy will work when nobody's done it before?