Where: We're looking straight down the Peak Tram line, which suggests the photographer might have been taking this from the front of the tram. But look closely and you'll see why that can't be true... We can see the tram in the distance, just in front of the second bridge. It's more likely the photographer was standing on the bridge where May Road crosses the tram line. There he could set up his tripod, and get a sharper shot.
In the foreground is a low building with a dark roof. That belonged to the filter beds, which are just out of sight on the left. Next look up and across to the right. You'll see the Bowen Road bridge, and just beyond that is a building with rows of flower pots on its roof, and a very inviting, shady verandah. That's number 5, Bowen Road, and happily it's still standing today.
Now look down the tram line, past the tram and under the Macdonnell Road bridge, and you see the back of the Helena May building, set at an angle to the camera. They've got the awnings down to keep the sun at bay.
Behind that are a couple of flat white roofs. I'm not sure exactly what they are, but I'll guess they're related to the construction of the East Wing of the Central Government offices, which would later stand on that site.
Next we see the Cathedral's tower, and beyond that the Bank of China Building. Today it's called the 'old' Bank of China Building, but here it's shiny and new (compare it to the rather grubby looking HSBC building on its left). The open area to its right is the cricket pitch, today's Chater Gardens.
The strip of buildings beyond the pitch remain much as they looked when they were built, around the start of the twentieth century. The exception is the blocky building with the aerials on top. That's Electra House (later called Mercury House), which was also finished around the time this photo was taken.
Who: Who indeed - I can't find anyone to talk about in this photo. From the shadows it looks to be shortly after noon. Is everyone at lunch?
When: Electra House was finished in 1950, and the Bank of China building in 1951. I'm guessing this was taken shortly after, say 1952. Corrections welcome!
What: There's one of the Navy's warships tied up in front of the Navy's dry dock. Does anyone recognise it?