Turns out that the three-tiered system that the UK government introduced a while back is the old five-tiered system with the two top tiers removed because they thought that the worst of the pandemic was over.
Locally, we are a tiny blob on the map of the UK that is now in Tier 4. Petersfield is not. Southampton is not. Neither is Chichester. As far as I know, that is.
Turns out that the UK has a second strain of the virus going around that does not appear to be more deadly and does not appear to make people more ill but that is much more contagious. So the hospitals are being flooded again.