Rolf Harris, on trial for sex assault, and serial killers have featured in a crisp advert after a social media campaign backfired.

Walkers Crisps invited Twitter users to send in photos of themselves in a bid to win Champions League tickets.

Some people took the opportunity to tweet photos of serial killers such as Fred West and Harold Shipman.

Ex-television presenter and former Sydenham resident Rolf Harris, currently on trial for indecent assault charges, was also pictured in the campaign.

The company then retweeted the images being held up by Gary Lineker with the hastag #WalkersWave.

A spokeswoman for Walkers Crisps told News Shopper they are 'trying to get to the bottom of it' and will release a statement in due course.