0.7-1.2cm across, light brown/yellowish in colour, 50-75% transparent shell on smaller specimens
No interactions present.
According to the Killeen key, the maximum size for tenuilineatum is 2 mm. Yours is far too large to be a Pisidium. A Sphaerium is more likely.
Lat/Lng: 50.859377, 0.06603
OS grid ref: TQ455086
Slow moving river