Loss of use of camera and torch since update
After I downloaded the new iOS to my iphone 6 it became apparent that I had lost the use of both my camera and torch. With the camera I get the whole user interface the flash on/off option switch camera around etc capture button but nothing is responsive, The screen itself shows a black screen as if its being blocked but will not respond ... I've tried closing the app in the home screen etc. General setting reset and powering phone on/off etc. Cannot use the app, no camera use on Facebook, snapchat etc.
iPhone 6, iOS 8.2