A 16-year-old boy was robbed and assaulted by a number of people in the Gade Car Park, off Rosslyn Road where his iPhone, ear pods, jacket and bag were taken from him.
The incident happened at 3.30pm on Monday 9 November.
The culprits were Richard Batchelor, aged 18, of Mildmay Road, Stevenage, is charged with robbery and assault, a 16-year-old boy from Watford has also been charged with robbery and both were remanded into custody and are next due to appear before court on Monday 21 December.
Three more males were also arrested in connection with the same incident; a 17-year-old from Watford, an 18 year from the Wembley area and an 18 year from Harrow.
PC Claudia McCready, from the Watford Local Crime Unit, said: “This was a harrowing experience for the young victim and those who witnessed it, and it will not be tolerated.
“We hope the victim and public feel reassured following the charges and arrests in relation to this case, but we are continuing to appeal to anyone who may have information about the incident to come forward. We believe there are more witnesses who have further information about this incident and I urge them to come and speak to us.
“This happened in broad daylight and in a busy area of town. Any detail, however small, could be vital to our investigation. If you can help, please don’t hesitate to come forward as soon as possible.”
All three have been released on conditional bail while enquiries continue.