A hoard of some 1400 Roman coins dating to the 4th century CE have been recovered from an archaeological site near Newport Pagnell (Laura Hannam, "Treasure hunters set to coin it with Roman haul", MK News). The recovery took place in the dark during a December evening: "It was about 5.30pm at this time of year so it was pitch black and we couldn't see a thing." And this was not a surface find: the hoard was about 1 metre (c. 3 feet) below the surface. The report adds, "it is believed the hoard was deposited on a Roman rubbish pit." Sadly this archaeological context is now disrupted.
Paul Barford has already commented on the story making the point that this find shows that Roman coins can be found in association with an archaeological site. Indeed the hoard contradicts the misinformation generated by Dave Welsh, one of the officers of the Ancient Coin Collectors Guild (ACCG) (see also other comments).