The Health Protection (Coronavirus, Restrictions) (Self-Isolation) (England) (Amendment) (No. 6) Regulations 2021 are quite new and
and this is their summary
"These Regulations amend the Health Protection (Coronavirus, Restrictions) (Self-Isolation) (England) Regulations 2020 to remove the distinction between close contacts of a known or suspected Omicron case and close contacts of all other positive cases. All close contacts, regardless of the variant, will no longer be required to self-isolate if they are:
(a)a person who has received a complete course of the coronavirus vaccination, provided that the contact takes place more than 14 days after they have completed their course of vaccinations;
(b)a person who is taking part in a vaccine trial,
(c)a person who can provide evidence that for clinical reasons they should not be vaccinated, or
(d)a child.
The Regulations also provide that, where a person comes within those categories, but was in a period of self-isolation before 6.00 a.m. on 14th December due to their close contact with a known or suspected positive Omicron case, their period of self-isolation ends at 6.00 a.m. on 14th December. "
So the gist of it is if my vaccinated adult children who live here test positive then I have to isolate (unvaccinated). They have the power in effect to imprison me and I have the power in a sense to kill them (assuming an infection of mine might kill a vaccinated person).
I suppose "complete course" is the interesting bit. One son just had his booster so not yet 14 days beyond that and the other is tomorrow.
Those 2020 regs references say complete the course is 2 doses however. I am surprised those newer regs do not define complete course to update it for boosters. So may be those without the booster 14 days ago are still complete course if had the first two. (Also if you cannot for medical reasons have the vaccine then the regs say no legal obligation to isolate if someone in your home has covid with a PCR and you do the daily tests)