Sadly you can't keep the virus out of the homes and care hones where the vulnerable live.My personal view is any type of lockdown would be low down the list of possible solutions. Here is a very high level overview.
I would prefer to see a solution whereby all the money we're currently spending on saving businesses, being spent on protecting the the vulnerable people that need shielding = this by providing intensive support through various means.
I would tell all Businesses (Hospitality, Hairdressers, shops, offices etc,,,to remain open but to deploy effective Covid 19 safe strategies.... entry/exit controls, masks, social distancing, working from home etc...
I would advise the younger people (say under 60's) that they should continue to work but look after themselves and take care and stay safe, this way I would hope the virus would transfer around that community and be kept away from the older generation and care homes and hospitals,
The money that was saved by not paying job protection and furlough etc.... I would ensure through investment, that there were first class quick turnaround testing facilities available to:
anyone that was symptomatic,
This might have to stay in place for six months or maybe more but the essence would be the country would continue working and generate revenue that would pay taxes and wages.
to continue locking down in the hope we will rid ourselves of the virus is in my opinion pointless, it will keep coming back and we will be in this position forever and a day until a vaccine is found, this is something that I believe is totally unrealistic. The public just wont accept it.
200k+ deaths in addition to what we've had if we let the virus rip.
You can however stand a chance of isolating the infected till they are well again. So call for volunteers to be infected. After a heath check send them to holiday camps or hotel clusters for 2 and a half weeks starting with a low metered dose of the virus, followed by free food, £125 of free drink tokens and dancing and the like.
Some people will still get very ill. But very few will die. A hell of a lot less than what is happening at the moment for sure.