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A leading cycling campaigner is calling for tougher action against law-breaking cyclists after she was knocked unconscious in the street.

Barnes town centre manager Emma Robinson had left a meeting to discuss improving cycle routes when she was sent flying by a man riding on the pavement outside offices in Twickenham.

Mrs Robinson said she was briefly knocked out and suffered severe concussion as a result of the collision last month.

She returned to work the next day but had to revisit the hospital after she “blacked out” and said she still suffers from dizzy spells.

She said medics told her it may take up to three months to make a full recovery.

Mrs Robinson told the Standard: “It was a very scary moment. It was literally moments after I had come out of the offices and the next thing I knew I was on the ground.

“I flew through the air and hit my head which meant there was a lot of blood. When I did come to I remember I had no vision and couldn’t feel my arms and then I just remember this pain in my head.”

Mrs Robinson told the Standard the cyclist initially stopped at the scene but then attempted to flee when he learned police had been called.

Police confirmed a man was arrested but could not provide any further details.

Mrs Robinson, described as a “champion” for cyclists, is involved in a number of projects to improve transport links across Barnes including transforming a disused Victorian railway bridge into a pedestrian and cycle crossing.

But today she said tougher action was needed against cyclists who ride on pavements at fast speeds or go through red lights.

She said: “I am someone who has championed cycling provision but it does need to be balanced. Cyclists need to respect pedestrians and follow at safe speeds. This chap clearly wasn’t.

“I’m a great advocate of getting people on bikes and improving routes so people can get around quicker and easier but with that comes hand in hand with respecting pedestrians.

“I have an element of anxiety when I’m out and the other day as I was crossing in Barnes High Street a cyclist whizzed through a red light and in front of me. I thought it was happening again.

“I’m not sure what can be done but there doesn’t seem to be any significant penalties for cycling on the pavement or for riders who whizz through red lights. The feeling I got from police was that there was nothing they could do in my case.

“Had this man hit an elderly man or my young daughter it could have been a different story.”

MP for Barnes Zac Goldsmith, told the Putney SW15 website: "Emma has been a champion for cyclists, as well as a brilliantly active town centre manager. I’m pleased she has recovered, but appalled by what happened.

“Clearly the police need to take a stronger stance on this sort of behaviour."