OMG, Cabanas. Now I'm hungry for something I will probably never have again. Thanks, guys.
My input: Farmer Giles crisps. Little piglets (bacon flavour?) that imploded when you sucked them.
And around the same time (early 80s) some delicious seashell-shaped crisps. Can't remember the name (Seashells?) or the flavour (seafood? salt & vinegar) but somehow remember the texture being divine.
Remember what they say, though - memory does weird things to the senses. If they brought any of these things back, they probably wouldn't taste as good as you remember (and not because they've changed the recipe !).
But Wham Bars have definately shrunk. And Curly Wurly. And the chocolate doesn't crack off Curly Wurlys when you bite them any more, which is wrong.