What about these statistics for bame - banding (segregating) every non white into another grouping. This does not show the full picture.
Such as british asians are hugely underrepresented by professional footballers (never mind managers), whereas black people (of any origin) are probably over...
Over 50% of the uk population are female. So before we start crying about the lack of bame managers - what about the misogyny of there never having beeen a female top flight manager