Think there’s been maybe even a handful perch over 6lb now, biggest a 6lb 4 a few months ago that I think got turned down. From a southern Stillwater whatever that means lol.
Unofficial Thames record is about the same I believe which I think is the second out of it over 6lb, they’re the biggest river ones I’ve heard of. Not surprised really as there’s lots of big perch around here let alone in the lower river which tends to be big fish country. My grandad did 3 possible 4s I think across 2 seasons a few years ago.