Warning: This article contains accounts of sexual abuse.
The 700-page, four-year Sheldon review said there were known to be "at least 240 suspects and 692 survivors" - with the actual number "likely to be far higher".
Since 2016, there have been convictions for abusers such as Barry Bennell, Bob Higgins and George Ormond.
Now, in a new three-part BBC documentary series, some of those survivors talk harrowingly about the abuse they suffered as children - and the power of finally speaking out.
Andy Woodward
Woodward was abused by Bennell between the ages of 11 and 15 at Crewe Alexandra academy.