My mum has COPD and often ends up in hospital with pneumonia. A few years back after a particularly nasty bout the consultant took me and my dad into a side room and explained;
That ultimately they were dealing with lung failure
That they would continue to treat infections with antibiotics
They would not recommend my mum be intubated if things got worse
They would not put her in icu
They have made the decision that her notes should read 'do not resuscitate'
My mum was 65 at that time. She's still with us two years later but her quality of life is poor, she suffers from memory issues due to oxygen/carbon monoxide problems and has almost constant infections.
What I'm getting at though is that hospitals have to make the decisions all the time about who would/would not be suitable for icu or resuscitation. This isn't new. Yes, the NHS is underfunded and will likely be on its knees soon due to Coronavirus but...but, I've no doubt they would do whatever was in their capacity to do for people in their care at that time. If it does sadly come to prioritising an otherwise healthy person for an icu bed than someone who is likely to never fully recover from covid19 then they have to do the right thing, don't they?