When there are extrapolations /over-interpretations , they are due to individuals not the discipline , in this case the dissenting voice ,complete with evidence ,was also an archaeologist.
As in science, historical speculation taken from archaeology is changed one discovery at a time. I intended no slur on the noble pursuit.
Missed your dissenting voice and evidence. From sources related to the link you provided (thanks again, fascinating) regions of Britain do seem to have been aceramic for a surprising amount of time after the occupation and pots from earlier periods were reused. I think I agree with Thesweetcheat that loot a more likely motive for digging stuff up, pots a welcome bonus.
Hopeless dilettante that I am, I'll flit on to something else to interest me for a day or so now.