Apple is holding an iPhone-themed event for media on Tuesday 4 October at its Cupertino campus, it has been officially confirmed.

The event is widely believed to be the long-awaited unveiling of the iPhone 5. Invites have been sent to journalists in the US and the event will be held at 10am Pacific Time, which is 6pm BST.

New Apple CEO Tim Cook is expected to deliver the keynote address and as well as a new iPhone, iOS 5 and iCloud are likely to be officially unveiled.

It was also reported earlier this week that a Facebook app for the iPad will be announced at the event.

Meanwhile, Japanese website Macotakara claims that the iPhone 5 will launch in the UK, US, France, Germany and Japan on Friday 14 October. We'd already heard that Apple had blocked staff from taking leave in the first two weeks of October though some sources believe the launch date to be 21 October.

Reports from supply chain sources last week suggest that there could be a problem with some components, with touch panels manufactured by Wintek apparently affected by a problem known as 'delayed bubbling', where air bubbles appear in the panels but aren't immediately visible so are only noticed during assembly.

The iPhone 5 is expected to have a faster, A5 processor as sported by the iPad 2, 1GB of RAM (twice that of the iPhone 4), an 8MP camera, and a larger screen. The jury is out on curved edges and a tapered back, and an elongated Home button is a possibility too.