Tony,
The location of the photograph of 2594 when it was with Westlink, is a bit vague - "Westlink garage":
http://www.wmbusphotos.com/NXWM/gonebatches/2436to2735/2594.html (http://www.wmbusphotos.com/NXWM/gonebatches/2436to2735/2594.html)
The actual location is Kingston Coal Yard i.e. the overflow parking area for Westlink's Kingston garage which was on the opposite side of Cromwell Road. The Coal Yard is now the site of Kingston's Cromwell Road Bus Station which is currently closed for rebuilding.
Happy New Year
Ian Hardy