The incident occurred around 11.50 p.m. on Thursday (16/02) on the footpath behind Barn Glebe, which connects to Farris Way/Oxford Gardens.
The female victim was walking her dog when she confronted another dog walker whose dog was not on a leash.
The suspect punched her in the face with his open palm and snatched her phone from her grasp, which he then tossed into a hedgerow.
He is described as a white male, 5ft 8ins to 6ft tall, with a slim athletic build, crooked teeth, and a brown beard.
He was dressed in a cream knitted hat with a logo and a dark zip puffer jacket.
The suspect was walking from the Oxford Garden direction with a chocolate Labrador named Harvey before running off in that direction.
We have been given a brief clip of the suspect’s doorbell footage and would like to hear from anyone who recognises him or has additional footage.
If you can assist us with our inquiries, please call 101 and reference number 54230017619.