It is essential to report any wreck material or any historic or valuable finds to the relevant authorities.
Metal Detecting
If you intend to go metal detecting you must ensure you are complying with the law. If you intend to metal detect on private land or a public outdoor space you must obtain permission from the landowner and/or occupier before venturing onto any land. Further information can be found on the Portable Antiquities Scheme website.
https://finds.org.uk/getinvolved/guides/codeofpractice
Reporting treasure, wreck material or archaeological finds
The following websites provides detailed information about the procedures to follow when reporting wreck material or any historic or valuable items in England and Wales, Scotland and Northern Ireland.
https://www.gov.uk/report-treasure-step-by-step
https://treasuretrovescotland.co.uk
https://www.nidirect.gov.uk/articles/archaeology-and-treasure