There is an American company called Unicross which can be made out of some of the letters in connoisseur. A five-barred gate has just one diagonal cross strip.
Thank you all for your help - Yes I like Prudential Calibax and Gate Gourmet although I've never heard of it it fits the clue
My dear late brother set the quiz a few years ago and his widow brought it to our gathering on Saturday to celebrate what would have been my dad's 100th birthday but she couldn't find the answers. It was a good evening nonetheless