Martin Mere is located north of Ormskirk in West Lancashire, north-west
An extract from the report:
Whilst walking around the Mere`s edge Richard came upon a massive fish basking in the shallows. It`s black,oily, scaleless back bore a small dorsal fin . Disturbed the massive animal made off and dove in a tremendous swirl to reappear briefly further out close to a small island.. It dove again in amidst a huge disturbance. It`s length was hard to estimate as only the back broke the surface but if it was attacking swans the team agreed it would have to be around 8 feet long. Though we did not photograph the monster we confirmed it`s existence and are confident that it is infact a wels catfish.
The CFZ have a theory as to how it got into the mere so go and have a read.