Blackberry has unveiled the two mobile phones it hopes will resurrect the struggling brand. The Z10, which has a touch screen, and the Q10, which has a physical keyboard, go on sale in the UK tomorrow, and elsewhere in the world next month. The new phones run an entirely new operating system called Blackberry 10. The handsets do not have a home button, instead using a user’s thumb to ‘flick’ across the screen. The firm also boasted of over 70,000 apps for the device, including Facebook, Twitter, Linked and Angry Birds.