The Ministry of Defence has provided the following answer to your written parliamentary question
To ask the Secretary of State for Defence, what steps he is taking to ensure that steel plating made before the nuclear testing era and taken from maritime war graves does not enter the supply chain for scientific and medical equipment.
Stuart Andrew, Parliamentary Under Secretary of State, Minister for Defence Procurement:
UK Government officials continue to work closely with regional authorities to protect the wrecks of Royal Navy vessels, share information and support each other's interests where possible to protect these sites and to ensure the last resting places of our people are adequately protected. Where we have evidence of desecration of the wrecks of Royal Navy vessels, we will take appropriate action.