Malign Frequencies: Further Transmissions from Horsingdon, No.75: Trentford Mere

Trentford Mere is a scrap of ancient wetland, not far from Croxley Common. It is a space resonant with the forgotten, spectral horrors of its drowned, archaic past. 

Some say that a series of squat monoliths trace an alien sigil across the weedy floor of the Mere; in local Trentford pubs, resident storytellers will regale the gullible listener with tales of lost, lonesome travellers who, finding themselves in the vicinity of the Mere, are soon after dragged beneath its black and oily waters by wet, scaly claws. 

Regardless of the truth of such claims, the right-minded folk of Trentford make a point of avoiding the Mere - especially at night.