My understanding is, to a large extent "beds" really means "physical bed and sufficient staff to support the patient in it" and the ingredient most missing is the latter.

Doctors tend to be ridiculously overworked in the UK. This is much worse recently - first doctors were off sick / isolating due to Covid. That means less doctors to do the same jobs having to work harder. That drives more doctors to either leave or take long term sick leave - goto 1.