麻豆约拍

As part of our series on 100 seats in 100 days, John Humphrys visits Watford market to sell washing powder to see what effect marketing has on voter choices.

Armed with boxes named 'Burst', 'Virtue' and 'Brit' many of those John met said they were influenced by the marketing techniques.

The market's fishmonger was not overly taken by the marketing saying "it's down to the individual, I don't think the public is silly."

Gail Parmenter, an advertising creative, says marketing is important now as voting habits have changed.

"In the past people voted very much on a brand level, so they would be very loyal to their brand and it would be quite difficult to make them budge. Now it's much more the consumer choice model, where people will be influenced by things right at the last minute," she said.