A motorcyclist was flown to hospital by air-ambulance on Saturday (19) following a crash in Harrow Weald.
The man, in his 40s, came off his Suzuki when it smashed into a Red Honda Civic at the junction of Common Road and Old Redding at 9.48am.
Surrounding roads were closed and buses were diverted due to oil spillage on the street.
The man was taken to The Royal London Hospital in Whitechapel, east London, with non life threatening injuries including a broken arm.
By 2.45pm roads were re-opened.