Most national newspapers have reported on the state of the industry in the last few years. The case of David Smith, who was exposed by the Sunday Times in 2006, was the start. He was revealed to have killed an estimated 10,000 ex racing or unwanted greyhounds over 15 years. It’s still going on now. The lucky ones get rehomed or stay with their owners/trainers. The unlucky ones get discarded.
https://www.mirror.co.uk/news/uk-news/brit-greyhounds-raced-collapse-boiled-11630624