Cadbury Schweppes has resurrected the Wispa chocolate bar after a grass-roots consumer campaign on social networking sites.

Cadbury, the world's largest confectioner, said it had decided to bring back Wispa after being "persuaded by the might of the Web", the company said.

Lovers of Wispa had launched online campaigns on sites including MySpace and Facebook clamouring for the return of the chocolate bar, which was first launched in the 1980s. The product was last on UK shelves in 2003.

A Cadbury spokesman said: "We have noticed the web interest for some time and the consumer passion has undeniably swayed our opinion to re-launch Wispa. This is the first time that the power of the internet played such an intrinsic role in the return of a Cadbury brand."

Wispa will be relaunched for a "limited period" in the UK in October.