One possibility is that Thames Water have leaked drinking water into the river which raises the oxygen levels too high for fish. This happened a couple of years back and they were fined for it.
Another is that oxygen levels can crash if there’s too much algae.
River ecosystems are very fragile and anything that messes with oxygen levels will kill the fish.
There was a lot of algae on the river the other day, which lends credence to what you say. It doesn't seem to be flowing as fast as it usually does
Should be reported to The River Authorities or The Environment Agency.
Here’s a picture of one of the walksmen with his dog in the fifties.
Hugh I think this is who us kids on Woodberry Down Estate in the 1950/60's called "Red Beret" You see in this photo hes wearing a Thames Water cap with badge,special occasion I guess for the photo, because he always wore a red beret. We called him "Strawberry nut" That dog was off the leash on the river bank. Friend of mine had hes backside bit after climbing over the fence to retrieve hes football. He just couldn't get back quick enough. Those were the days! Now you can walk most of the river.
Back in the day the river was full of fish and very clean,the river was always maintained by workman in boats with scythes cutting the reeds back,no algae in those days. No bricks and shopping trolleys! Its a sorry sight these days at the Woodberry Down stretch.
Thanks for that first-hand tale from our past.
Great stuff, thanks for sharing this.
I like that Vic..........."Strawberry nut". Good tale.
From a rather disturbing post on a local Facebook group:
Is there any clue as to where the pollution incidents are happening?
Beyond 'on that stretch', no. Everything seems OK between Turnpike and Hampden which confirms it's downstream of there.