Taken some time between 1963 and 1975. Most likely nearer 1963.
Photo by Martin Hulbert, reproduced with kind permission.
Many thanks to Facebook members The Pompey Bible, Albie Somerset Malc Ball, Ian Marshall and Des Judd for helping to narrow down the location of where this photo was taken. Identifying that it was taken at Canal Walk, from the top of the steps of Jacobs Ladder footbridge. Overlooking Portsmouth & Southsea Station, where The Guildhall can also be seen in the far left distance.