Never one for understatement, archaeologist Paul Barford has also blogged about UK coin finds, claiming that their sale constitutes a "rape of history." See:http://paul-barford.blogspot.com/2009/05/uncleaned-coins-in-us-and-rape-of.html
While I agree that such coins should be properly recorded under the UK's VOLUNTARY PAS, let's be realistic about the worth of these coins for the study of British history.
First, from the descriptions provided all are likely very common coins of the Gallo-Roman Empire or later. The types are well known and thousands and thousands of similar examples already reside in museum collections across the UK and elsewhere (as well as in many private collections).
Second, from the encrusted and corroded look of them, it is likely that these coins are largely, if not mostly, groups of single surface or near-surface finds from disturbed contexts. As such, their value to archaeology is likely minimal, or even non-existent. Indeed, it would surprise me if such coins were recorded in any real detail when found at most archaeological sites.
If anything, such coins are so common that they have been ignored by scholars, who are more interested in "sexier areas" of Greek and Roman numismatics. Indeed, because he thought such coins were under appreciated, a collector friend of mine from the Ancient Numismatic Society of Washington, D.C. even penned a book about such coins from the late Roman Empire. See: http://www.easeweb.com/rossperry/details.asp?id=4 It seems to me that concrete effort to advance the study of numismatics is much more constructive than anything I have or will ever likely read on Mr. Barford's blog.
Given the number and length of his posts, Mr. Barford apparently has a lot of free time on his hands. Perhaps, if he truly thinks these coins are so significant, he could volunteer some of that time to help record, clean and identify by catalogue reference number some of the thousands upon thousands of similar coins found each year in the UK. Maybe, just maybe, a few weeks of weeding through piles and piles of virtually identical "AE 3's" and "AE 4's" might be just the thing to give Mr. Barford some much needed perspective.
Addendum: I asked Paul Barford to clarify this statement in his latest salvo: "'The study of "Numismatics' by itself is not really important in the broader scope of research on the human past ...." See: http://paul-barford.blogspot.com/2009/06/cultural-property-clairvoyance.html In this, Barford is demonstrably wrong. For example, much of our knowledge about Bactria is derived from the work of scholars who put together a chronology of the Kingdom based on the study of well-known coin types.
I also asked Nathan Elkins his thoughts on this point. See: http://coinarchaeology.blogspot.com/2009/05/week-3-picture-language-on-roman-coins.html
Their responses speak for themselves. I agree with Elkins that a multidisciplinary approach is useful for studying artifacts, but note his own course suggests that the iconography on coins can provide meaning without any reference to archaeology. See: http://coinarchaeology.blogspot.com/2009/06/week-5-picture-language-on-roman-coins.html Despite his stated respect for numismatists, it appears Barford's actual experience with coins is limited and that he indeed only values them as archaeological artifacts. Obviously, I disagree with his disdainful approach to the interest and contributions of anyone other than those with archaeological training.