Once the stamping ground of the 70s A-list, the Great Ouse Relief Channel has fallen from favour with today's generation.
Siltation of sluices and the tidal ouse have meant water from the river has been released via the Channel, causing many fish to be washed through the tail sluice into The Wash.
But Denver's sluices have now been re-opened, reducing the need for run-offs via the Channel.
And now controlling club King's Lynn AA has revealed a recent EA survey found large numbers of fry, along with predators taking advantage of the food source.
Check out the perch - not to mention trout - in these slideshow pictures.
Click here to see them.