Apple are expected to unveil three new iPhone models amid a wave of new products - including its biggest smartphone yet.

The iPhone XS, XS Max and XR are tipped to be revealed during the tech giant’s annual media event.

CEO Tim Cook is expected to launch the new smartphones, a revamped Apple Watch, new AirPod earbuds and new iPads.

The announcement will be streamed on Twitter live from Apple’s California HQ tonight from 6pm BST.

The most anticipated of the new launches is a successor to the iPhone X, which debuted last year and became the most expensive smartphone to hit the shelves, retailing for an eye-watering $999 (£767).

Leaked images of the updated model suggest it will feature an all-glass design, 6.5-inch OLED screen, Apple’s latest processor and at least 4GB of RAM.

The iPhone XR, which has been likened to the iPhone 5C, is expected to retail for $650-750 (£500-600) and come with a range of colourful cases.

Other anticipated launches include the Apple Watch 4, which will target the Christmas market.

The device refresh reportedly boasts a bigger screen, longer battery life and enhanced health monitoring.

Cook is also expected to unveil two new models of AirPod earbuds, with a pricier model offering noise cancellation and water resistance.

While Android devices have made waves in the smartphone world, the UK remains one of Apple’s strongest markets.

Last year the iPhone 7 was the most popular device sold in the UK, with Apple occupying 34.4 per cent of the UK smartphone marketshare in 2017.

Samsung, the world's biggest smartphone maker, unveiled its latest flagship handset, the Galaxy Note 9, last month and Google is likely to showcase Pixel devices in October.

Huawei, which recently overtook Apple in global smartphone sales, is also working on a flexible device of its own.