Thanks I may have to reinstall. I emailed my son to tell him of the problem and he has found exactly the same thing has happened to his Blackberry, he also has this Razzle site which neither of us loaded.
He's told me how to reset the home page by using the options menu when I'm in the browser but unfortunately the options button doesn't work.
Is this a common problem and have we got a virus on it? It seems very strange that two Blackberries in different locations have the same unwanted website on them?