Three teenagers attacked a man from behind as he walked in Coffee Hall last week.
The attack happened between 6-7pm on Monday, February 23, as the 27-year-old victim was walking in Jonathans.
He noticed three men and one verbally abused him, but he kept walking until he felt a blow to the back of his head and the back of his legs.
The victim fell to the floor and as he looked up he saw three men running away.
He sustained a graze to his stomach but did not require hospital treatment.
The offenders were aged between 17 and 20 years old and were wearing hooded tops.
If you have any information contact Sgt Deborah Seagrave via the Thames Valley Police Enquiry Centre on 101.
Alternatively call Crimestoppers, anonymously, on 0800 555 111 or online at www.crimestoppers-uk.org