Great photo, Ian. Now I can really bore people!
The photographer is standing with his/her back to the market and Corn Exchange, and looking at Tin Pan Alley. On the left someone sold toffee apples, and my mother would buy me one if I had been good. Straight ahead, the curving street is the top of Old Town Street and the bottom of Tavistock Road, with the Guinness clock off on the right. The side of Dr Scholls' place is in the top centre of the picture, with the Bedford Vaults (hidden) in the same block. The El Sombrero is in the block on the right.
The photographer in No 28 was further up from the Bedford Vaults and looking north. He could see the corner of Queen Anne Terrace and the road leading up to the Harvest Home and Coburg Street corner.