Ian Anderson (Jethro Tull), I believe he was involved with salmon farming up in Scotland, whereas Roger was trout farming down in southern England. I stood in several times on his Dorset farm (covering managers holidays) and set up his rearingg farm near Rutland water. He also had his fishery in Sussex.
I could tell tales, but staying true to rock-'n'-roll "What goes on tour, stays ........".
Edit: I think he sold the farms many years back, but he had a canny business brain.