The salvage boat Barnet ( United Kingdom) standing guard overnight under the Warspite's bows, at Prussia Cove was holed in the engine room, towed off and eventually drifted ashore at Long Rock, a few miles to the west.
Wikipedia
The Bandsmen wear the cap badge of the DCLI. The Royal Defence Corps was formed in 1917 composed of mainly older men and was effectively the forerunner of the Home Guard of WW2