Police are trying to identify a child who was seriously hurt following a collision with a motorbike in Ealing on Saturday (March 18).
They are desperate to contact the parents or carers of the child, who is thought to be around nine or 10 years of age.
The collision happened on Popes Lane at the junction with Knight’s Avenue at around 12.15pm.
Officers and the London Ambulance Service attended the scene and found the boy with a head and leg injury.
He was taken to a central London hospital where he remains with serious injuries.
Detectives are keen to locate the parents or carers of the young boy as it appears he was alone at the time of the incident.
At this early stage it is believed that the boy got off a Route E3 bus moments before the collision occurred.
The child is described as a white, 4ft to 4ft 5ins tall and has dark coloured hair.
He was wearing a black ‘Parka’ style anorak, with a fur edged hood and red lining.
On the anorak there is a leather disc with a logo and the words ‘Get outdoors’.
The boy was also wearing beige trousers and black ‘tie dye’ Nike trainers, with the Nike tick in fluorescent green.
Police say it is of paramount importance that anyone who recognises his description contacts detectives from the Serious Collision Investigation Unit immediately on 020 8991 9555, 101 or via Twitter @MetCC
The motorcyclist, who stopped at the scene, was not arrested and is assisting detectives with their enquiries.
Keep up to date with the latest news in west London via the free getwestlondon app
You can even set it to receive push notifications for all the breaking news in your area