A Met Police spokesperson said: “At 05:28hrs on Sunday, 29 June police were called to Piccadilly Circus following a single vehicle road traffic collision.
“A black BMW had overturned, ending up next to the Eros fountain.“Officers attended with London Ambulance Service paramedics and the London Fire Brigade.
“Two men, both aged 22 and both occupants of the vehicle, were taken to hospital.
“One of the men is in a life threatening condition. The other man’s injuries are not believed to be life threatening.
“No pedestrians were injured and no other vehicles are believed to be involved.There are road closures in place around Piccadilly Circus.
“We recognise the disruption this will cause. We will look to remove these at the earliest opportunity but only when we have carried out the work required to investigate this serious incident.”