There has never been any point in a lockdown beyond what is necessary to remain within NHS capacity and to help protect the vulnerable. It was never possible to assume a vaccine would be developed so plans could never be made on the basis of immunisation. With no long-term solution in sight the only option was to contain the hit on the NHS. I've assumed that within the planning allowance was made for the numbers unlikely to comply with any directive and for the number of essential workers likely to be exposed. Having NHS capacity available for the foreseeable future means that the slow trickle of people exposed to the virus can be treated and therefore the death rate can be kept as low as possible. Allowing more and more freedom as time goes on is acceptable as long as NHS headroom remains. Nothing other than their own efforts will prevent vulnerable age groups from being affected. Social distancing within essential businesses (mainly food and medical outlets) is just about all the help older people can, or should, expect.
Without seeing the variables used in the epidemiology modelling relied on by SAGE it is impossible for us to know what percentage of non-compliance with the restrictions (and SD) was assumed initially, and how high such percentage was assumed to increase over time. They took advice from experts in human behaviour. My take is that it could have been 20% non-compliance at the beginning, but by now they must be modelling the outcome of over 40% non-compliance (at least in the under-30 age group). I understood that some scientific advisers have grave doubts about the latest relaxation of restrictions and inevitability of spikes.
The government's contract with the consortium to manufacture 15,000 new ventilators for the NHS remains in place. The critical shortage will still be the available number of qualified NHS front line staff. Goodbye again to all the other NHS clinical services that haven't yet managed to catch up with the waiting lists and cancellations prior to 23 March when these other very important clinical services had to shut down. A second wave will be catastrophic for patients on those waiting lists including those who were added in the past 3 months. Urgent cases may be put back another 12 months if/when there is a second wave. Right now there are no appointments available for me and I was told it could be December before I can get an appointment just for scans, followed by another wait of months to see a Consultant. A&E was very quiet in early or mid June but apparently it is back to pre-Covid attendance levels.
Imagine the impact on the UK economy of a second shutdown of all except food and pharmacy. There must be a limit to the willingness of the international Bond markets to lend more to the UK Treasury at these absurdly low interest rates. At some point reality will kick in.