BlackBerry unveils new all-touch phone

The new Z30 handset goes on sale next week Credit: BlackBerry

BlackBerry has officially unveiled its new all-touch smartphone as it ramps up attempts to claw back its share of the market from rivals including Apple.

The Z30 smartphone comes with a 5-inch display and the largest-ever battery to be fitted into a BlackBerry smartphone.

BlackBerry's announcement comes two days before Apple's new iPhone - the 5S - hits shelves on Friday.

New findings from market research firm Kantar Worldpanel ComTech show BlackBerry had been the third most popular operating system (OS) this time last year, but sales have tailed off - now just 3.5% of the market share, down from 11% in Britain a year ago.