https://www.thestar.co.uk/news/crime/brave-south-yorkshire-police-officers-who-overwhelmed-sheffield-gunman-remembered-63-years-on-3970515
https://www.thestar.co.uk/heritage-and-retro/retro/how-laborer-calmly-walked-sheffield-pub-and-shot-three-men-dead-cold-blood-2881278
