Apparently, one of the systematic failings that was discovered at the hospital, was that there was a cultural norm, that the doctor was unaware of, that medications that were normally prescribed for the patient, but had not been prescribed by the admitting doctor, could be given without prescription. The admitting doctor had decided not to give the enalapril, because it is an antihypertensive, and he was already underfilled, but she didn't document that she had decided to omit it, because she assumed that by not prescribing it, it would be omitted. In that hospital, to ensure it wouldn't be given, it would need to be documented that his usual drugs should not be given. Absolutely barmy in any other hospital, because legally, nurses can't prescribe drugs unless they are prescribers, they can only administer drugs that are prescribed
This sounds like the perfect system where the swiss cheese model is demonstrated, an utter shit storm is going on and this is the straw that breaks the camel's back, so to speak.
SHOs do not purposely avoid coming to the ward to prescribe meds, they are often dealing with other urgent things elsewhere in the hospital (my limited experience, hearing this from junior doctors I know).
Plus, it's a very dangerous culture where ward staff robotically give regular meds...the clinical picture can obviously change, patients get sick and certain meds are stopped.
I guess that is the nature of medicine and working as a doctor- you don't just give regular meds because they are on the patient's list of meds- you make decisions based on the current picture, as Dr Bawa-Garba did in this scenario.