[bbfan1991]

We have no idea of his backstory apart from those little clues they have given us, he will not be missed.

In terms of the crash I think:

Spoiler:

Jono will die and Bart jailed or possibly dying because he is driving a car behind the bus before it crashes.

Rhys is a possibility too because they have made his character go back to being sleazy again and he has no real links to the village, it would be a shame if they killed him off because he is still one of the more popular characters in the show.