Quote Spongebob="Spongebob"I've just received a text from a lady who says she was a passenger in the car . She says that KL was sat next to her on the back seat & was sober.'"
To add to that, it would be be routine for the police to breathalyse anyone who they suspected might be the driver if there is a collision and people are there at the scene for some time after. For instance, if a period of time passes before anyone gets to the car, as of course people have the chance to swap positions. Being breathalysed and being taken away is no indication that the person was driving or is going to be charged. They will commonly take people away to conduct other tests. Fundamentally, the police still have to prove who the driver was (although there is a legal authority - Smith-v-Mellors - that states that if it can be proven that two or more people were in a car but it cannot be shown who was the driver, except that one of them definitely was, you can charge both or all with drink driving, provided both are over the limit, justified on the basis that the passenger was encouraging the driver).
The police routinely breathalyse people involved in an accident.
One piece of legal advice: if you are ever asked to blow into a breathalyser, do it! I've been involved in so many cases where people have been prosecuted for not blowing where if they had blown and failed, it could not have been shown they were the driver. End up with ten points, which for many meant a ban. You can also get longer bans for not blowing.