Sibling rivalry was in the air at the opening of the Greenhouse Centre in Marylebone as Prince William and Prince Harry went hea- to-head during a game of table tennis. During the match, the Duke of Cambridge accused younger brother Prince Harry of having “too much chat to start with”. Report by Swinnertonl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn