I think we need to be careful with the term 'lockdown'. In my opinion we have never been in real lockdown in this country as a whole population; I'd certainly agree that those deemed to be vulnerable, and those in residential care homes especially, were locked down though.
When Spain was in 'lockdown', children were not even allowed to leave their home for a number of weeks. That's locked in my opinion. Vulnerable people and their families excepted, we were never totally banned from leaving our homes. We certainly had to stay inside as much as possible, but we were allowed out: to exercise, and shop for groceries.
Even if that's classed as 'lockdown' (and I accept it's the general consensus and usage that it is) we are very unlikely to head back to those levels of restrictions. We will almost certainly have further and more stringent restrictions placed on how and when we come into contact with others, but I really don't see us coming anywhere near being locked down.