A well as a good selection of facing bricks we keep a selection of commons and rejects which are ideal for infilling and for agricultural or garden use.
The reject bricks are normally classified as rejects on the basis of size (eg deviate from British Standard) or colour. They are normally as hard as standard facings.
Because we buy these in "job lots" we cannot guarantee continuity of type or colour. So you should carefully check what are available and and buy sufficient to complete your project.