I had season tickets for Ladybower for ten years through the 90s and never caught, or saw, a brownie for about eight of them, although they advertised that they stocked with them regularly.
I knew a guy who regularly followed the boat around when they stocked it - it was done on a weekly basis. You could count the numbers of fish as they were scooped up and put in. He estimated that there were considerably less than half the number of fish put in, over a season, than the 35,000 advertised - as for the browns? - and catching a trout with a full set of fins was a memory to be cherished.
The Stocking Programme (1999)
"Nearly all the fish that you catch at Ladybower have been reared here, and during the season we will be introducing up to 35,000 mixed brown and rainbow trout, including browns to over 4lbs and rainbows to over 10lbs".