Some interesting if deflating statistics to wade through here though often the method on collection and verification is something of a grey area.   Some of it makes little sense I reckon.

 

https://www.gov.uk/government/publications/salmonid-and-freshwater-fisheries-statistics-2019/salmonid-and-fisheries-statistics-for-england-and-wales-2019?fbclid=IwAR0ucClr6uVA3GnyUUckVUsdfCLDWKfbwGCSBA7xg845d58EsU7bHEW92IE#:~:text=These%20are%20the%20rod%20statistics%20for%202019.&text=The%20total%20declared%20salmon%20caught,compared%20with%202018%20(13%2C608)