Such a wall can be built in sections - each section is tied to the next by inserting expanding steel mesh between the block work and by overlapping the steel mesh fabric within the cavity.

To the right can be seen steel pilings, driven in beforehand to retain the land during the build. Although the pilings can be removed afterwards, it is usually cheaper to leave them in.

The steelwork ready in the next section. To the left can be seen the end of the land drain, ready to be attached in the next section. Two batterns are attached to the steel mesh, indicating the level to which the concrete will be poured.

And don't forget scaffolding to finish the top of the wall and for rendering.