Variety seem to have an exclusive on a Film & TV Charity report[pdf] on Racial Diversity Initiatives in UK Film & TV by Dr Clive Nwonka and Professor Sarita Malik.
Here are the top lines from it:
“There is a notable absence of an account, analysis or explanation from the various institutions and organizations as to why such schemes and initiatives have produced stagnated or in many instances regressive outcomes for Black and Ethnic Minorities in the film sector,”