Win a free World Cruise for P&Os 175th anniversary!

Did you know P&O is 175 years old next year? I know they're part of the Carnival corporation now but they're still British run and there's not many other companies that can claim a record that long.
As you'd expect for their cruises 2012 they've got a lot of plans with new cruises, destinations and deals planned.
The bit I'm most interested in for 2012 though has to be the date of their anniversary, 03rd July 2012!