BBC Worldwide has also launched widgets for and to give users instant access to the sites' latest content.
Marcus Arthur, managing director of BBC Worldwide's digital delivery team, which developed the widgets, said: "Widgets are a great way of keeping track of your favourite websites on your desktop or social networking site.
"They're easy to install and keep you up-to-date with the information you want, where and when you want it.
"Widgets provide a powerful tool for driving traffic and site loyalty among users -- by getting your brand and content direct onto a user's desktop, start page or social networking site you can guarantee regular and prolonged exposure to continuously updated content."