Mossdale Beck is a small stream running off the side of Heron Pike into Ullswater. I used a long exposure to give the flowing water a milky like effect amongst the wet rocks.

The technical bit:
Location - Ullswater, Cumbria
Camera - Nikon D800
Lens - Sigma 35mm f1.4 DG HSM Art
Aperture - f11
Exposure - 4 seconds
ISO - 100