I live in a country where everyone vaccinates. It does not stop the virus circulating, but it does mean that kids tend to get an incredibly mild mini-version. My DDs got this. They got maybe 6-7 very small spots (but definitely CP - I had them checked at the clinic to be sure, as my youngest was a baby and not yet vaccinated, and I needed proof that the eldest was infected with CP in order to expedite the baby’s vaccination. Where I live, they will vaccinate a baby under 1 if an older sibling is confirmed to have the disease, on the grounds that getting the vaccine at slightly too young an age is less risky than full-blown chickenpox).
The two kids had no symptoms other than the tiny spots and the fact that their temperatures went up about half a degree for one day. Great appetite, just sat indoors for a day or two and did coloring and TV etc. We stayed in for a couple of days anyway, to be sure we did not pass it on to a pregnant woman etc., but it was an absolute non-issue.
I’m really happy we vaccinated. A friend of mine forgot to get her son vaccinated and he caught it, the full-blown version, at about 8 (because as I mentioned, the virus does still circulate here). He ended up with a bunch of unfortunately placed scars on his face and she still feels really guilty about it. The people I know in the UK who have let their kids get CP have had various expreriences, but some of the cases sound grisly and I’d be furious about having to take that much time off work.
The shingles vaccine will almost certainly become the norm for everyone going forward anyway, because there is emerging evidence it may reduce the risk of dementia in women, and possibly some other beneficial effects. And the country I live in does not have any more shingles than the UK in any case.