confusion of yesterday with journalists and bloggers getting lots of things wrong here is the Police statement of what actually happenned:
Officers and London Ambulance Service attended and a man, believed aged approx. 40, was taken to a west London hospital suffering head injuries. Scans showed these not to be serious and he was released following treatment to a cut.
Enquiries into the circumstances of the incident are ongoing. Officers have arrested another man on suspicion of GBH and he has been bailed to return in early September.
The bus driver stopped at the scene, he was not arrested.