An aerial view of the Penarth Head Fort and Coastal Battery [061] with the two 6" quick firing gun emplacements clearly seen in the enlarged (colourised) image. The battery was approved in 1902 but the guns were not in place until 1906.
A chart of the Seven Sea Defences of 1912 shows interlocking arcs of fire at Penarth, Lavernock and Nell's Point at Barry. Coupled with the four batteries situated on Flat Holm and other guns on Steep Holm the system provided comprehensive protection of the approaches to the strategically important ports of Barry, Penarth and Cardiff. The Penarth guns were reported to be still in place during the 1920's.
All sea defences were controlled from 'Lavernock House' nearby the Lavernock Battery. They also experimented with rocket firing there; one brought down a plane. This info came from a booklet named 'Guns Across the Seven' subtitled 'The Victorian Fortifications of Glamorgan' ; it is so interesting, however, the authors neglected to say if the plane which was shot down was one of ours! [321]