Cadbury's Nut 'n Crisp

My new favourite chocolate is Nut 'n Crisp from Cadbury.

I've not seen this available anywhere, except in a pound shop in Eastbourne, where they sell 4 bars for a pound.

The bars seem to be of Irish origin, at least all the contact details on the wrapper seem to be for Cadbury Ireland. They are just at their "best before" date.

Were these bars a trial launch that wasn't a success? There is nothing on either of the Cadbury websites, and a quick google doesn't seem to turn up anything either.

Any information gratefully recieved!