Retaining wall steps

[AdaminCymru]

Please could I have a sense check. Is this acceptable method of constructing steps within a retaining wall? The wall was existing, and steps new and part of the patio project. 
 

Clay soil behind the retaining wall, dug out on a slope. Mortar / concrete laid straight onto clay soil and steps formed off this. Brick face and porcelain slab on the top.

 

Thank you