Approximately 50 environmental advocates gathered for a public demonstration near Lewes on Saturday, August 22, to draw attention to conservation concerns surrounding a distinctive freshwater fish population and the ecological health of the River Ouse and its associated waterways.
The event, arranged by the right-to-roam organisation Landscapes of Freedom, took the form of a collective walk through the North End Stream valley.
Participants moved along public footpaths from Cooksbridge to the River Ouse, pausing at various locations to examine sea trout spawning areas and assess the current condition of the watercourse.
These sea trout, colloquially referred to as the Sussex Tiger, possess notably large dimensions, with individuals commonly reaching lengths exceeding 2 feet 6 inches and weights beyond 15 pounds.
Their biological lifecycle involves extended periods at sea before migrating back to freshwater environments in Sussex to reproduce in gravel-bottomed nests known as redds.
Dave Bangs, a co-founder of Landscapes of Freedom, serves as a naturalist, author and countryside campaigner with extensive knowledge of Sussex ecology.
His concerns centre on residential construction proposals near Cooksbridge, which he believes could endanger critical breeding habitat for this fish population.
In submissions to the local planning authority, Bangs argued that the North End Stream represents a vital component of the sea trout’s survival, being among the initial significant spawning tributaries encountered when the fish return from marine environments.
He contended that the proposed development would extend for almost half a mile alongside the waterway and two additional tributaries utilized by spawning fish.
The planning application from Cala Homes seeks permission for 151 residences at Cooksbridge.
Separately, broader draft Local Plan provisions would designate land for a combined total of 751 homes in the surrounding area.
The North End Stream flows into the River Ouse as a tributary.
Bangs has formally objected to the Cala Homes scheme, characterizing it as an existential threat to the sea trout population.
He cited multiple compounding pressures affecting river systems, including pollution, wastewater discharges, recreational disturbance and climate variation, which have already contributed to substantial reductions in sea trout numbers throughout the region.
Currently, only two dwellings stand along the entire length of the North End Stream.
Bangs expressed concern that approval of the Cooksbridge development would establish a damaging precedent and fundamentally damage the stream valley’s ecological integrity.
During Saturday’s demonstration, walkers reported sightings of kingfishers, reed buntings and numerous swallows along the route.
Participants did not encounter any landowners or farmers during the event.
Bangs indicated that valuable connections were established between those present, substantial information was shared regarding the stream’s significance, and proposals for additional activities were discussed.