Well, at present all in UK are being used as an experiment to see how having a 12 week gap between the doses works out. Nobody knows what the result of that will be.
At present all that is happening is giving large numbers of people one dose, which gives them only marginal cover (and even how much of that is still subject to disagreement particularly for older people).
Another unsure factor is how quickly those of us have both doses may require more boosters. Talk is of once a year like the flu one.
I would think that, until such time, as all those who want these jabs have received a full dose - and, maybe, even first booster for next winter, we really are not in a position to get concerned about the refusniks.
Equally important is to remember we are these days very much part of a one world - so do need to ensure that vaccines are available for the entire world in order to start to bring about an end to this particular virus.
In UK we have never brought in any sort of compulsory vaccinations - maybe we should would have prevented deaths in recent years from measles, etc. Do not see why this vaccine should have any different rules.