By Ben Griffiths A heartless private healthcare firm billed a grieving widow for her husband’s treatment just days after he died in their care. Lecturer Phil Morris, 48, had gone into St Anthony’s hospital – owned by private health provider Spire – for a life-changing £12,000 gastric sleeve operation due to a backlog in the NHS. Just days after the surgery, dad-of-one Phil died from a lack of oxygen after what the family claims were “a catalogue of errors” as he recovered at the Surrey hospital. But to add insult to injury, blundering staff at Spire – the UK’s second biggest private health com…