In 2006 Blue Smarties were removed when Nestlé decided to make Smarties free from artificial colours. The firm has since found a way to create the variety with no artificial colours and flavours by extracting the blue colouring from a seaweed called Spirulina.
Frank is also launching a 'consumer emotional' campaign to encourage mums to see the fun side of Smarties with their children.
'We're very excited to be re-launching the Blue is Back campaign. It allows us to reassure parents that Smarties are made with no artificial colours or flavours as well as inject an element of fun into the brand with an exciting campaign aimed at families,' said Frank PR director Alex Grier, who heads the account.