London mayor no fan of vuvuzelas at 2012 Olympics

CAPE TOWN, South Africa -- London mayor Boris Johnson has joined the vuvuzela chorus in South Africa. But he doesn't want the horns to catch on back home.

Johnson arrived in Cape Town Wednesday to tout his city's hosting of the 2012 Olympics, and his country's bid for the World Cup in 2018.

He said London and England could learn a lot from South Africa's impressive staging of football's biggest event, and offered two blasts from the vuvuzela.

He called it a "beautiful instrument," but said he didn't want them at the London Games.

Johnson also backed England to improve throughout the World Cup, and said as a former goalkeeper he had sympathy for Robert Green after the blunder that allowed the United States to secure a 1-1 draw.