This piece should really fall into the category of sculptural relief. In some ways, it references some of the work done in the 1960s using concrete which created slabs of decorated reliefs often referred to as murals.
The piece is described as showing the activities of the Adult Education Centre which is where the mural is located. It was one of several pieces within the centre grounds though it looks like this is the only piece to have survived.
We are currently researching the history of this mural. If you can help, please do get in touch.