Boom

One hundred years after guns on the White Cliffs at Dover first successfully repelled a German Zeppelin raid, Dover Castle once again resounds to artillery fire.
This British 3-inch gun, the only working example of just six left in the world, was built in 1915, and was one of the early guns specifically developed to combat the new threat of aerial warfare.

After months of restoration work, it has been installed at Dover Castle as part of an authentically recreated 1915 anti-aircraft emplacement, where regular weekend firing demonstrations are given by a specially trained team of costumed English Heritage volunteers.
It was fired twice see extra