Yes indeed the second photo is Orchard Place as I wrote. And yes, it was indeed the Stone House rear entrance down at the end. The old clinic was on the right.
As for exchange gateway, was/is that not the alleyway further down Fargate as shown on this old map below? I believe my photo shows the other, smaller alley(now gone) It's alignment with the town hall tower and the fountain would suggest that. Of course, my memory might be playing tricks again. I'm more than happy to be corrected..
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