Via Know Your Place Bristol/the Tarring Collection.

The Mardyke area—apparently Mardyke means a dyke on the margins, which would make sense for the location—in the 1930s. That's got to be a Campbell paddle steamer from their White Funnel fleet, but I don't know which one. Looks to be a similar configuration to the Princess May, though the paddles look a bit different. In the background, the Mardyke Pub still stands today, but the three largest buildings do not. They are:

Top right: the Clifton National School (there's a Loxton sketch uploaded to this Wander where you can see the name on the front.)

Directly in front and below the Clfiton National School, on the main Hotwell Road: The Clifton Industrial School, Mardyke building.

Standing halfway up the hill, more towards the middle of the picture: the Clifton Industrial School, Church Path Steps building.

Lots of info to be found on the Industrial Schools here:

In addition to their classroom lessons, the boys were employed in tailoring, shoemaking and brush-making, with basket making later added. The boys also assisted with the kitchen, laundry, and house work. In 1870, some additional rooms were rented in the locality for use as an infirmary if required. A School band was established.

I can't find so much on the National School (though apparently the Bristol Archives have some of their records) but the Clifton & Hotwells
Character Appraisal suggest it was built in 1835 and, along with the Industrial School buildings, destroyed during WWII:

A bomb also largely destroyed the Clifton National School and Mardyke House School. The lack of bomb- proof shelters in Clifton led to the Clifton Rocks Railway to be used as shelter, which was prepared for occupation in 1940.