The cyclist was knocked off her bike by a tipper truck turning left onto Victoria Street.

Police and ambulance workers arrived within minutes but the woman was pronounced dead at the scene.

The London Evening Standard reported that the driver of a red and blue construction site lorry was interviewed by police but he was not arrested.

The area is home to a series of major construction sites.

A security guard in a nearby office block who witnessed the accident said: “Some workers from the construction site rushed down to help the passers-by who had gone to the cyclist’s aid. They came running down and did what they could until the paramedics arrived.”

Both the cyclist and the lorry were believed to be turning left onto Victoria Street from Palace Street when the accident happened.

One witness said they had both stopped at a red light and were turning left after it turned green.

The bike is thought to have been caught under the wheels of the lorry.

A London Ambulance spokeswoman said: “We were called at 8.20 to reports of a road traffic collision on Victoria Street. We sent a motorcycle responder, an ambulance crew and a duty officer to the scene. The first arrived in 3 minutes. Sadly the patient was dead at the scene.”