A friend, Colin (he of the burning batteries), sent me this photo of the first PDP-7 being delivered to Edinburgh DCS: 
I didn’t recognise the location, but he managed to make out “Hope Park something” on the street sign.
Searching for “hope park edinburgh computer science” yielded this AI history page, which reveals AI can be traced back to a small research group in a flat in Hope Park Square.
Some more playing, and here it is today. It even has the same porch!
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