Last January an unfortunate comment from Ringo on Jonathan Ross\'s BBC chat show outraged parts of Liverpool and may have provoked the attack.

Ringo, who appeared on the show a week after launching Liverpool\'s celebrations as the European Capital of Culture, told Jonathan he missed \'nothing\' about the city.

The life-size topiary figures of Liverpool\'s most famous band - which were grown in Tuscany, Italy, from privet - were unveiled last month at Liverpool\'s South Parkway transport interchange. The piece was created by Italian sculptor Franco Covill.

Ringo\'s head has still not been found.