Lock operator on the Sharpness Canal at Frampton on Severn in Gloucestershire, United Kingdom. The Gloucester and Sharpness Canal is a canal in the west of England, between Gloucester and Sharpness; for much of its length it runs close to the tidal River Severn, but cuts off a significant loop in the river, at a once-dangerous bend near Arlingham. It was once the broadest and deepest canal in the world.