The one o'clock gun shot

The gunnery sergeant proudly presents the empty shell after yet another successful one o'clock gun shot ceremony at Edinburgh Castle.

The One O'Clock Gun is fired every day (except Sunday) at precisely 13:00, allowing citizens and visitors to check their clocks and watches.

The origin of the tradition lies in the days when sailing ships in the Firth of Forth were able to check and reset their chronometers in the days before accurate timepieces were available.