Police are appealing for a woman who helped a boy who was robbed at knifepoint by three men.

Last week, this newspaper reported that a 15-year-old was threatened with flick knives and robbed of his iPhone and bag in Gills Hill Lane, Radlett on September 7 at around 2.30pm.

The victim had been walking along with his friend when three men got out of a parked red Citroen and began pointing flick knives at him.

He was robbed of his bag which contained his mobile phone and the gang then fled in the direction of Watford Road.

The boy was not injured and neither was his friend but the victim immediately ran home, shaken.

However, just after the robbery took place, a woman approached the victim to see if he was okay and it is this person police would like to speak to for help in their enquiries.

Detective Constable Ian Waldock, who is investigating, said: “We would like to reassure the public that this type of incident is very unusual in Radlett, and we are doing all we can to trace those responsible.

“We are particularly keen to speak to a female member of the public who kindly offered to help the victim after the incident. He was shaken and instead ran straight home, but if you were the lady who approached him, we would very much like to speak to you as you could have vital information that could assist us in our investigation.

“If you witnessed what happened, or have any further information that you believe could assist police, please contact us.”

Any witnesses or anyone with information should contact DC Waldock on ian.waldock@herts.pnn.police.uk or the non-emergency number 101, quoting reference 41/34658/18.