Retrocorn is UK popcorn made with British retro sweets.  Not to be confused with RetroCon, which is a collector's fair for 80's paraphernalia (like Star Wars or Thundercats figurines) which occurs annually in Philadelphia.  Very different thing indeed.  Retrocorn make their popcorn lovingly and with no added preservatives or funky chemicals, then they bombard it (we hope at high speed using some kind of Bond Villain-esque device) with bits of classic retro sweeties like Cola Cubes or Rhubarb & Custards.  Absolute genius.