Shares in multiple F1 World Championship-winning outfit Williams have plummeted by over a quarter since the Grove-based out floated on the Frankfurt Stock Exchange at the start of last month.

Williams have endured a dismal start to F1 2011, with Rubens Barrichello and Pastor Maldonado both retiring in Australia and Malaysia and while they did get to the chequered flag in China more recently, it was only in 13th and 18th respectively. As a result shares fell by 3.4 percent after the race in Shanghai and over the last month they have decreased by 13.9 percent.

Shares closed just before Easter at 17.69 Euros, while they had been worth 24.21 Euros when trading started back in March - a reduction of 27 per cent.

Sponsorship consultant Julian Cotttam told British newspaper, The Guardian, that the decision to float was poorly conceived.

"I can't see any motivation at all for a brand to align with a team that has made such a fundamentally flawed decision," he told the 'paper.

"I didn't see why Patrick Head [co-founder of Williams F1 and director of engineering, who is due to retire this year] was so determined to offload his entire stock in the business at a time when Williams has had a long period without any great success on track."

Williams is the third-most successful team in F1 history - with 16 world championship crowns to its name. However it has not claimed a title since 1997 nor won a race since 2004.