The Guardian released a video yesterday which showed Chris Grayling, the minister for Transport, swinging open a car door into the path of a cyclist, knocking him off as a result. Ironically, it was only a few weeks ago that he told the Evening Standard that segregated cycle lanes “cause too much of a problem for road users.” If there had been a cycle lane he’d have been less likely to have knocked the cyclist off.

“Dooring” is a hazard that many cyclists will have had some experience of, either having to swerve to avoid it or actually colliding with a vehicle as in this case. But whose fault is it and what should you do if it happens to you?