For example, the salvage rights to the Aboukir, Cressy and Hogue were sold by the Admiralty to a German scrap company in the 1920's.
I thought that modern military wrecks/war grave (post WWII) were protected from salvage in British law? I know there was a large fit over the USS Murphy, a few liberty vessels, and U-Boats on our side of the pond. NOAA raised hell over the USS Monitor that sank 130 years ago and it took numerous court cases just to let divers with "special" permission to dive her.