The incident took place on the path, near to the Andover Down roundabout, that runs between London Road and Picket Twenty, sometime between 3.55pm and 4.15pm on Friday 17 March.
The victim, a woman in her 20s, was walking along the stretch of the path than runs parallel to the A3093, before it crosses into Picket Twenty, when she was approached by a man on a bike.