I'm pretty sure England has some strict laws regarding Metal detecting finds that fall into certain parameters of antiquity or value....You might consider doing some research on the laws...
Then of course, what you do with that information is entirely up to you! I would not trust myself in obeying Mans Laws, English or otherwise or offering advice to you...
All I can say...? For sure?
If I went on a MD vaca in England, and I found the Staffordshire Hoard, I'd carefully contemplate the risk reward and all options...then I'd be going through customs at Heathrow about 100lbs heavier than when I showed up!
..When asked if I have anything to declare?...I'd holler, "Yeah! "I declare that All Men are Created Equal! Except the bloody Irish!" ...
Red carpet treatment straight to the gate!
A guy has to learn how to work the crowd and behave appropriately when abroad...
Theres regional sensitivities a guy has to be aware of moreso than Laws...Like you dont wear a red bandana in Crip territory, You dont toast Long live the Queen in a Glasgow pub, you always order grits at a Waffle House, and you never wear white after Labor day...