It is an interesting question and the current Government stance can only be interim because (assuming the vaccine works etc) it begs future questions such as, perhaps, transition from obligatory face mask wearing etc between those that have had the vaccination and those that, for whatever reason, have not.
Perhaps the "nots" should carry a bell, have to call out "(potentially) unclean" and be branded "Enemy Of The People"?
As an ex-HR Manager who was involved with line management in the appointment/ promotion/ development etc of many people I was always interested in the power of group culture - and the consequences of developing a reputation for being "difficult" or "not one of us".