A sensible approach would be to not make rules they have neither the technology nor inclination to enforce properly .
Just nick everyone who is not socially - distancing (unless in the bubble).
Supermarket? Nicked.
High Street? Nicked .
Minding your own business, sitting on a park bench with a coffee? No bother.
I haven't given this any thought so, on that basis, it is probably more effective and workable than the contradictory and unenforceable crap the committee of idiots come out with , on a nightly basis.