When vaccinations were compulsory in Britain and how they gradually became voluntary

Within living memory, having children vaccinated against some diseases was a legal obligation in this country. It is interesting to imagine what would happen if such a law were to be brought in again; say for the COVID-19 vaccine.. #:~:text=The 1853 Act,-Vaccination Act 1853&text=By the Act of 1853,by some other medical practitioner.