My concern is that digging a 1 metre deep hole on a December evening ("it was pitch black and we couldn't see a thing") is not the best way to recover scientific information. Do the fragments of pottery relate to a pot that contained the coins? Why is it "believed [that] the hoard was deposited on a Roman rubbish pit"? More information is needed (and has been requested).
Nathan Elkins has written a response to the news story placing the discovery of Roman coin hoards in context ("The controversial 'excavation' of a coin hoard"). He closes his thoughtful piece with this:
There is a difference from picking up decontextualized surface finds and disturbing contexts deep in the earth.