Picked up some Salted Caramel KitKat Senses today for just £1 in Poundland. I couldn't see any other flavours in my store but they probably will have the others in elsewhere. Ive never had them before because they cost about £4 in the supermarkets but for a quid they're absolutely excellent!
They're kind of like two-bitesize chunks of a KitKat with a topping of salted caramel. Something like a Twix but more high-quality and less gooey. You also get wafer instead of biscuit.