Where?
If you are thinking of the licenced taxis on the south side of the
street, they are in a carriageway lay-by dedicated as a taxi-rank. IOW,
they're not on a footway (have you ever seen a taxi-rank on a footway?).
This was in force during the construction of the Shard complex, the
refurbishment of London Bridge station and the laying-out of a new bus
terminus in that immediate area (accessed from Borough High Street).
Since that stock photo was taken, some years ago, that temporary lay-by
has been reconstructed as part of a new and repositioned footway. The
taxi-rank has been moved round to the area immediately in front of the
station concourse (where there was a taxi-rank before the redevelopment).
Happy to help. You need it.
PS: The photo shows quite a few bicycles parked on the footway.