Crikey, must be grim down south Colin.
Its all fine and dandy oop norf.
Tony, at the risk of being accused of scare mongering or romancing over former glory days.
As a teenager (20+ years ago), if I were to go on the Cherwell with half a pint of maggots and trot a float along any glide, I'd expect to catch roach and/or dace, once a few were caught move on and in a few hours have accumulated 10 - 15lb of fish.
Now the first big challenge would be to find a dace, any dace, Christ even the adjacent Oxford canal had huge shoals of roach and dace, albeit they were small fish, now all gone!
Barbel were never really that widespread or numerous even in their perceived hey day, now I doubt there are even 30 adults in the whole river.
Barbel nearly all gone, roach, dace, gudgeon, minnows in serious decline, on a plus (ecologically speaking, cos I detest the little buggers) perch seem as numerous as ever and chub though very much less abundant are bigger than they've probably ever been or ever will be.
Admittedly bream are in some areas making a bit of a boom, sadly other areas they're also in decline.
This picture is repeated on the Evenlode and Thames, if it wasn't for the carp I'd never go near the Thames and they shouldn't even be in the river, invasive alien species that somehow the EA now accept as being 'almost' indigenous, why, well stick a couple 20lb+ carp in a stretch of river and hey presto the bio-mass is sky high and probably for a sustained period due to the longevity of carp.
The thing I just continually fail to fathom out is why on earth do the EA year after year carry out bloody fish censuses, blatant waste of time money and effort, when clearly the info is unused.... No habitat improvements, no top-up stockings, no action what-so-ever and certainly the powers that decided upon the Thames valley's suitability for otter re-introductions never read through the census reports, either that or they are just simpletons!!
Oh well my preferred quarry is chub and I like em big, so......
Failing that catching tench and carp is enjoyable enough, I spose.