Cadbury Wispa 'Wispa Duo' by Fallon

To mark the launch of new Cadbury Wispa Duo, the bar which is split into two pieces, an an online and outdoor campaign asks the nation which side they prefer - the left or right.

Consumers are asked to share which is their preferred side of the bar and to report if their left bar has been swapped for a right one, or if they suspect they may be eating their bar the wrong way round.  

Consumers can also go to the Wispa Facebook page to let other Wispa fans know which side of the bar they favour and to find out if others agree.