Frys Five Centres
This was around in the 1970′s (along with a Cadburys bar which was like a box of chocolates in a bar). However it was withdrawn -
The bar of Chocolate that was a box of chocolates was called the Milk Tray bar and featured eight of the chocolates from the box of Milk Tray. The Lime barrell. the orange half moon and the strawberry were my faves…
….and on Aztec bars, I bought one in Angelsey when they were briefly re-issued there in around 1996. The original bars tied in with the 1968 Olympics ..not as nice as I remember them ..great purple wrapper though.