Wanna bet? I can change EXIF information on my photos, its dead easy. Thats why in court they wont accept digital photos as evidence. Also, why you should always keep a film camera in your car in case of accident
Having said that, a digi photo with the time stamp will be more than enough as most people dont know how to change the EXIF data. The counsil dont understand that stuff so if you have a photo then they will accept it as long as it has some kind of relative measure so they can see how deep it is.
They are also cheeky buggers, I have heard a few stories of people not getting a photo on the scene, report it and go back to get a pic only to find its been filled already!