Does anyone know Apples policy on dead pixels on the iPhone ?

[Dangerous Dave]

In the last week or so my iPhone has developed a stuck pixel in the centre of the screen that is very annoying ! The nearest apple store is a 70mile round trip so I don't want to waste my time going unless they will fix/replace it. Does anyone know there policy on dead/stuck pixels ?

 

[Dangerous Dave]

All O2 want to do is send it away to apple leaving me without a phone, they also can't say if it will be covered or not. So I could have no phone for a couple of weeks and then get it back with the same issue.