GeoGraph - photograph every grid square

Staffed 24 hours a day, 365 days a year by a team of operators, lock managers and engineers who are responsible for operating and maintaining the barrage. The control room is the main point of contact for boats wishing to use the locks and navigate to and from Cardiff Bay.
The yellow lines are nothing to do with parking restrictions but are part of a piece of public art. For the full picture see ST1972 : 3 Ellipses for 3 Locks.