The lock screen feels much bigger in iOS 7 thanks to full screen images and dropping the black bars of iOS 6. It's a simple visual trick, but one that makes the screen feel physically bigger.

There's plenty of new features in iOS 7 but the most striking change will be visual

The latest version of Apple's mobile operating system, iOS 7, will be rolling out to customers in the UK from 6pm this evening. Company CEO Tim Cook has described it as "the biggest change to iOS since the introduction of the iPhone" and there's certainly plenty of changes to take on board - in terms of both functionality and looks. Here's a whiz through some of the biggest.

(Click here for a breakdown of iOS 7's new features)

(Click here for a review of the new iPhone 5s and 5c)