To cut a long story short they turned out to be Anurida denisi, which the key describes as not having been seen since Bagnall recorded them pre-war in England and Ireland. I was pretty sure that I had what the key said I had but nevertheless reference to somebody who knows better was inevitable in this case. Fortunately it turned out that he agreed and so that's it. The record stands, the specimens will be winging their way towards Roehampton University and I'm a very happy springtail botherer this morning!
Here are the pics:
|Initial examination in alcohol|
|Keying in Hopkin|
|Slide prep of ecelli and PAO at x600|
|Diagram from Hopkin|
And Steve Hopkin's page on the species: Hopkin
Interestingly the species is listed on Buglife's Scottish springtails list, which certainly warrants further investigation: link