The photo was kindly sent by Dave Humphries, and shows the depot around the mid 1950s. It was probably taken either by his Uncle Les 
(Leslie E.Davis), who was a driver there, or by his Nan (Elsie Koolman) who was a clippie. I believe that all the buildings on the 
left have now gone, and only the one on the right (the original tram depot?) still stands. Perhaps someone can confirm this. 

(Kevin Stephens tells me "I can confirm that the Tramway offices are the only surviving buildings, albeit now used as residential flats 
after the garage was closed and demolished in 1991. The rest is now also residential, entered by a road aptly called Omnibus Way." 
Thanks for that info, and to prove it, here is a picture kindly sent by David Fisher taken in August 2006 from about the same position.) 

http://www.skylineaviation.co.uk/buses/busnews.html

skyline@enterprise.net