Turns out it was the o2 UK 4.1.2 firmware that had dodgy camera. Im unbranded now n its fine
Any o2 users got problem with cam taking burst shots when u hold in the button with "single shot" selected?
Thats a pest! im running 4.1.1 because when running 4.1.2 the wifi is totally unreliable. So i downloaded the 4.1.2 camera from XDA. Only downside is that changing from the front to rear camera takes a good 5 seconds.