The Environment Agency is introducing a new signal from lock keepers

Two new River Thames signs: Amber disc means lock keeper unavailable. Plain white board means lock keeper available

The Environment Agency has introduced new signs on the Thames to tell boaters, whether or not a lock keeper is at the lock. The signs will be introduced at all 44 locks on the River Thames by Christmas.

When a lock keeper is available, a white board will be displayed, when a lock keeper is not available an amber disc will be displayed.

Information on lock operation is already available at every lock site and can be found on the operating pedestal, in the lock office window or on the gate beams.

Customers are being informed about the new signs by posters and flyers, which are being sent to marinas, clubs, and key businesses along the river.