Hmmmm.
They also have a significant quantity of set specimens for sale too. One assumes they're the results of their breeding programmes!
I noticed that they have Light and Dark Crimson underwing ova for sale too, the inference in the advert is that it's British stock.
Also:
The Swallowtail (P.m.brittanicus)
The Swallowtail Butterfly (Papilio machaon brittanicus - Linnaeus) A rare and magnificent species, isolated to the Fens of Norfolk in the Uk although Widepsread and often common in Europe. We hope to have captive bred stock of the UK sub-species this season. LFP. Fennel, Milk Parsley, and carrott tops. Easy to rear in captivity. Available June-August.
I don't know quite what to make of these guys either.
Pete - perhaps a representative of the Lepidoptera Breeders Association could be invited to write a little piece about their efforts for this site? If they are legit then one would imagine that they wouldn't object in the least...
Felix.