Chickenpox vaccine was £110 for two doses in London. We didn't fancy DS getting a disease that's easily preventable to protect adults who haven't had chickenpox and can't be bothered to vaccinate for chickenpox (or shingles when elderly).
On the debate about whether all children will eventually catch covid if unvaccinated... I think it really depends where you live. We live in London, so I'd say yes it's inevitable in the course of a few years that DS will come across covid between schools, trains, tubes, indoor play/ restaurants, travel abroad etc etc etc. If we lived in East of England or Cornwall then maybe not. Luckily he still breastfeeds (greedy git won't stop), so we expect any symptoms will be mild or preferably non-existent as he'll have some antibodies. If or when there's a vaccine safe for his age though he'll have it.
On risk, idiot cleaner is high risk personally and exposed but won't be vaccinated. I suppose she's also ultimately a risk to him when we drop masks, though I'm more concerned about her exposure risk. Any ideas welcome on how to ensure she understands nobody cares if she's part of the summer wave, there isn't more lockdown coming to protect her if it starts flooding through the borough. I believe those saying "I'm not ready to be vaccinated yet" may not understand the situation is changing and the vaccine wall won't necessarily help them in particular if they have high exposure, it just reduces the overall numbers infected.