Aled Jones was robbed of his £17,000 Rolex by a machete-wielding teenager who threatened to cut off his arm, a court has been told.

The 52-year-old Welsh baritone was walking along Chiswick High Road, in west London, at about 5.40pm on July 7 when a 16-year-old boy, who cannot be identified, attacked him in broad daylight.

The teenager was due to stand trial at Wimbledon Youth Court on Thursday but pleaded guilty to robbery and possession of an offensive weapon after turning up late – with his trial already under way.

Robert Simpson, prosecuting, had earlier told the court: “The complainant, who is Aled Jones, was walking with his son when he was approached by a youth dressed in a black tracksuit top and bottoms and wearing black trainers.”

He said the teenager “produced a knife in the form of a machete from his tracksuit bottoms and threatened to cut off his arm and made various other threats in order to obtain the Rolex watch Aled Jones was wearing”.

Mr Simpson said: “Aled Jones immediately handed it over and the defendant made off.”

Machete found in teenager’s room

CCTV was collected from the area and the teenager was arrested at his home in west London.

At the time of his arrest, the boy was wearing a black Nike tracksuit and his trainers were ones he was wearing in the footage.

The machete was found in his room, the court heard.

The defendant was picked out by the singer’s son in an identity parade, the court was also told.

Jones and his son waited on a video link for almost two hours to give evidence before it was turned on for about a minute – with the star nodding and thanking court staff as he was told the teenager had pleaded guilty.

The boy, who wore a dark green tracksuit and trainers and appeared alongside his father, spoke only to confirm his name, date of birth, and address, as well as to reply “guilty” when each charge was read out.

District Judge Andrew Sweet told him the offending was “very, very serious” and adjourned the case for reports to be prepared.

He was bailed but must live and sleep under the direction of the local authority.

The case will next be heard at Ealing Youth Court on Sept 12, but the judge told the defendant he could not guarantee that the case will not later be sent to the crown court.

 Singer and television presenter attacked by youth wielding machete while walking with son