Cadburys Whispa commercial from 1986 featuring Dennis Waterman and Rula Lenska.

Cadbury Wispa is a chocolate bar made by Cadbury UK. The bar was launched in 1981 as a trial version in North East England and with its success it was introduced nationally in 1983. It was seen as a competitor to Rowntree’s Aero (Now owned by Nestlé ).

In 2003, as part of a relaunch of the Cadbury Dairy Milk brand, the Wispa brand was discontinued and the product relaunched as “Dairy Milk Bubbly”. As part of the relaunch, the product was reshaped as a standard moulded bar (similar to other ‘Dairy Milk’ products) instead of a whole-bar count-line. However, in 2007, helped by an internet campaign, the Wispa bar was relaunched, albeit for a “limited period”. In October 2008 Wispa returned again to shops in the UK and Ireland due to the chocolate bar’s popularity during the previous limited period release.

A product known as Cadbury’s Wispa, resembling a moulded Dairy Milk bar with bubbles and with different packaging, is available in some other countries, including Romania.

Info gleaned from Wikipedia