Between 8pm and 8.15pm the victim was walking on Horlicks Bridge in Stoke Poges Lane from the direction of the A4 when two men approached him, one from the front and the other from the side. One of the men punched the victim to his face, reached into his pocket and took out a small quantity of cash.
They pushed the victim in to the road and threatened him while demanding more money.
A small white car, which was possibly a Hyundai, drove up to the group. The driver, an Asian man in his forties, shouted at the offenders that he would phone the police if they did not leave.
The offenders ran away down Lansdowne Road and the car driver spoke to the victim, telling him to go straight home, which he did.
The victim lost a tooth during the incident and sustained damage to another, needing dental treatment as a result.
The first offender is described as a tall, slim man aged in his late twenties, with short dark hair and a small nose. He was wearing a grey tracksuit and black coat with a hood and pink and green trainers which featured a Nike logo.
The second offender is shorter than the first, and is described as white, slim, 5ft 9ins, approximately 40 years old and has a small beard and short hair. He was wearing the same clothing as the first offender and was carrying a black drawstring bag.
Investigating officer Detective Constable Simran Jaswal, based at Slough police station, said: “I would like to speak to anyone who witnessed this distressing incident, in which the victim who has learning difficulties sustained injuries, as these details could assist our investigation.
“I would also like to speak to the driver who came to the victim’s assistance, as he may also have information which could help us.”
If you have any information about the incident contact the 24-hour non-emergency number on 101 quoting the reference 43200315982 or call Crimestoppers anonymously on 0800 555 111.