Tron theatre, Glasgow Uma Nada-Rajah writes with polemical force from firsthand experience of a health system on its knees A black hole sign is the dark area of a CT scan that suggests a haemorrhage on the brain. A black hole could also be the gap that has opened up in the ceiling of a windowless A&E department, where a drip becomes a torrent, a metaphor for a crumbling NHS. And a "black h…
