Much as the idea of letting non vaxers go untreated appeals, as Andy says smokers plus alcoholics, the obese, drug takers, people in pub fights, dangerous drivers in accidents etc etc all get treated. The NHS is non discriminatory, so those who chose not to vaccinate are in the same position.

However those who have declined the vax might reasonably be asked why when they turn up at hospital with covid and might be deprioritised in favour of those still in the queue for vax. But it's more admin that the NHS doesn't need.