In this case, as I understand, the finders had permission from the tenant, but not the landowner who is said to have been anti detecting. Had they declared the hoard initially, they would likely be deemed to have been acting reasonably, if unaware of the true land ownership, and would have shared half of the multi million hoard valuation. Instead they are part way through sentences of 8 and 10 years, and with confiscation orders hanging over them. I have little sympathy.
Jerry