Above are various promotional items: cool bag; tin; tea cosy; ruler and the tray that marked the Golden Anniversary of the introduction by Rowntrees of the Kit Kat bar.
The Brit Kat Celebration Pack was produced to mark the Queen's Diamond Jubilee. On my original website you can see the wrapper issued to mark the Queen's Coronation in 1953.
Also on my original website, I said that I was not impressed by Nestle's reworking of the lettering when they introduced a highlight line. I notice that this year they have returned to a plain red as in the three packs on the left.