I have finally taken a photograph of the Britannia Pub in Castle Foregate. It was starting to get dark when I finally got there but you can see the passage with the big gates next door, and then the start of the Royal Mail building next door. I think that is where Halls Passage originally stood.
I was going to try and take more of the Royal Mail building but there were cars everywhere. I hope what I have taken is OK.
Can you PM me with your email address. I deleted your original PM by mistake, ooops!!!!