Commenters on the previous post suggested that Wellbeloved was previously based at 15 (and perhaps also 13 before that) Deptford High Street, so I went out to see if I could match up the two shop fronts. The first thing that I noticed was that the numbering is a bit strange, which is odd considering these buildings date back quite some time.
Number 15 (Ash Arcade) is a narrow shop front with two small windows, however number 13 is the 'Your Choice Pound Shop Plus' on the far side of the Orient restaurant. It seems the Orient is number 13A.
And from the old photo, looking at the three windows above the awning, the downpipe on the right and the building to the left which could easily be the curved bay of the aforementioned Pound Shop, it seems that this is where the shop was at the time the photo was taken.
Thanks to my commenters for their detective work!