prison cell after a brutal beating by inmates have described his treatment as “barbaric”.There was a five-hour delay in paramedics reaching Darren Brownlie, 47, by which time he was “unresponsive” in a pool of his own blood.Three prisoners who admitted killing him are due to be sentenced today at Glasgow High Court.But last night, Darren’s brother Robert said a perfect storm of failures by the prison, the NHS and ambulance services led to his death.Robert, 58, said: “My brother spent hours