Milk Tray is a brand of boxed chocolates currently manufactured by Cadbury. Introduced by Cadbury UK in 1915, it is one of the longest running brands in the confectioner’s portfolio. Milk Tray is sold in Australia, Canada, Ireland, New Zealand, New York City, South Africa and the United Kingdom.

The name ‘Tray’ derived from the way in which the original assortment was delivered to the shops. Originally Milk Tray was packed in five and a half pound boxes, arranged on trays from which it was sold loose to customers.

The pack design has been regularly updated and the assortment itself has changed in line with consumer preferences, and today it is still one of the most popular boxes of chocolates in the UK selling over 8 million boxes per annum.

From 1968 to 2003, and since 2016, the chocolate is advertised by the ‘Milk Tray Man’, a tough James Bond–style figure who undertakes daunting ‘raids’ to surreptitiously deliver a box of Milk Tray chocolates to a lady. The original tagline was And all because the lady loves Milk Tray.A YouGov poll saw them ranked the 16th most famous confectionery in the UK.

Info gleaned from Wikipedia