Lockdowns are just to decrease the rate of spreading (and avoid high concentration of virus particles) not to eliminate the virus, so everyone should prepare oneself to face it and get through. Just this.
Some small percentage of population in isolated regions have chances never meet the virus, but hiding is not the stable strategy.
Getting through and become immune is. This is what UK government is saying. Let's face it.
As any third-worlder knows perfectly will, everyone is on your own.
Aside from that, there are so many different factors (variables) that this oversimplified model is almost useless.
Every place, except China, which locked down a whole magapolis, will reach overcapacity of hospitals very quickly and UK government advisers know this.
'Flattering the curve' is a nice catchy meme though.
Some small percentage of population in isolated regions have chances never meet the virus, but hiding is not the stable strategy.
Getting through and become immune is. This is what UK government is saying. Let's face it.