The Hydrographic office web site actually lists some interesting aircraft wrecks but not a great deal of interest.

Mike E

Most, if not all, of the Hydrographic Office’s information on aircraft wrecks will have come from the diving community.

Agree ref aluminium/magnesium alloy sections. Steel sometimes fares better, but all very much depends on the seabed bottom and the local marine environment. Very much luck of the draw, but the clock is ticking very firmly on that luck.