I've put these in Foreign Products as I've not seen them on 'official' release anywhere - I got them from Home Bargains. Surprisingly nice considering they're from Nestle; I think these are their premium range (a bit like the Double Cream bars) so they spend more money on them. Truffle/praline style centres. Not tried them all yet but very nice so far!
Truffle/Praline! So imaginative! Glad you liked them though smufy
Those are they. I never spotted them myself but as the writing on the box is in English there's every chance the did get a release over here - maybe a regional/limited one?