Apple Watch and iPhones 6 and 6 Plus unveiled

Apple has unveiled its much anticipated Watch, as well as the latest models of its iPhone at a launch ceremony in California.

The Apple Watch - the company's first new product line since the first iPad - runs apps, acts as a health and fitness tracker and communicates with the iPhone.

The technology firm also announced a new service called Apple Pay, which chief executive Tim Cook said he hoped would "replace the wallet" in shops.

Technology correspondent Rory Cellan-Jones reports.