A young cyclist who knocked over and killed a mum-of-two while riding an illegal fixed-gear bike in Old Street shouted at his victim to “get out of the way” and later said the collision was her fault, a court heard.

Charlie Alliston, then 18, was said to be going at nearly 20mph when he collided with Kim Briggs, 44, as she crossed the road on February 12 last year.

Jurors at the Old Bailey heard Alliston was riding a fixie – a fixed-gear track bicycle with no front brake, which is not legal on the road without modification.

He allegedly shouted to her to “get out of the way” twice before their heads smashed together. But Mrs Briggs “ignored” him and “stopped dead” in his path, it is said.

Mrs Briggs suffered catastrophic brain injuries including two skull fractures and died days later.

On seeing a newspaper report about the incident, Alliston posted a comment online giving his version of events, where the comments were made.

He also wrote on the internet message board: “I feel bad due to the seriousness of her injuries but I can put my hand up and say this is not my fault.”

He described how their heads collided and hers “ricocheted” into his. “It is a pretty serious incident so I won’t bother saying she deserved it,” he added. “It was her fault but she did not deserve it.”

He went on to claim Mrs Briggs had been on her mobile phone.

He complained: “Everyone is quick to judge and help the so-called victim but not the other person in the situation.

“It all happened so fast and even at a slow speed there was nothing I could do. I just wish people would stop making judgements.

“People either think they are invincible or have zero respect for cyclists.”

Jurors at the Old Bailey were shown CCTV video of the collision in Alliston’s trial, as Mrs Briggs’ widower Matthew looked on.

The defendant had been riding a black PlanetX carbon frame fixed-gear bike – a vehicle more commonly seen racing at the Olympics Velodrome, jurors were told.

Fixies can only legally be taken onto the streets if they are fitted with a front brake, jurors were told.

If Alliston had been riding a bike with proper brakes, he would have been able to avoid the collision with the HR consultant, prosecutor Duncan Penny QC said.

Alliston, now 20, of Trothy Road, Bermondsey, has denied a charge under the 1861 Offences Against the Person Act of causing Mrs Briggs bodily harm by “wanton or furious driving”.

In a legal first, he also faces an additional charge of her manslaughter.

Mr Penny told jurors Alliston bought the bicycle for £470 to use on a track in January 2016, but in reality only used it on the road.

Alliston told police he had been riding a fixie since 2014, having removed the front brake from a previous model.

Mr Penny told jurors: “Riding a fixed wheel bicycle without a front brake through a busy area of central London at nearly 20mph at lunchtime – when hazards, such as pedestrians stepping out into the road, might well be expected to occur in front of him requiring him to react – was dangerous.

“What he was doing was such that all sober and reasonable people, knowing the circumstances as he knew them to be, would inevitably recognise it subjected other people to the risk of some harm resulting therefrom.”

The trial continues.

Court reporting by Press Association