Is the catch a Brown Trout?
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Some of those other pics in the cormorant observation are helpful for clarifying the fish as a pike. This one here is good too as the fin-less forward dorsal region is visible. Its dorsal fin is much closer to the tail than the head.
Those are probably the best 2 pics to show the distinctive pike rear portion.
Lat/Lng: 56.172296666667, -4.2893
OS grid ref: NN579000