I believe the ground gives up what it wants, to who it wants and when it wants!
A lot of it is about a state of mind, dont throw that trash back in holes or in the hedge. Take it home and bin it and the Gods will reward you. Look after mother earth and she will look after you.
It works!
I tend to agree, 18 months or so ago I got to one of my fields only to find two blokes detecting on it, I obviously went over and asked who they'd got permission off, they said they'd asked the farmer and he'd said it was Ok, I was a bit dubious as I know the farmer pretty well and am sure he would've told me about anyone else he'd given permission to, but I couldn't prove they hadn't spoken to him, typical I didn't have my phone on me
Anyway they stayed for a few hours, they seemed really intent on one bit of the field and said they'd google earthed it and it looked interesting, they really combed that area, but found nothing and they left when I did saying they might come back in the autumn, turns out they didn't have permission after all, they'd spoken to another farmer and assumed the field was his land
The next day I went back to the field and decided to have ago in the area they'd been concentrating on, now I know this field really well and this particular area hadn't turned anything decent up at all, so I wasn't expecting to find anything............. how wrong was I!!!! Within the space of 2 hrs I'd found a solid gold roman earring, an extremely rare penny of Henry VI it being a mule with a York obverse & a London reverse, only 5 others known
and a missing piece of a medieval reliquary mount the Mrs had found a few weeks earlier!