Don't try the Lamington ones Duke lol.The ones you mentioned sound tasty.
I had to look up Lamington, I don't remember any dessert flavored crisps in the UK. I do recall seeing a Brit dipping French fries/chips in chocolate sauce one night in a pub. The chocolate came in a small, prepackaged container with a pull off cover. Closest thing I could compare it to here is canned cake frosting. He was drinking Bulmar's hard cider with it. I remember thinking the guy was probably going to have a really bad next morning.