In an interview with The Telegraph, the BBC Controller of Drama and serials Kate Harwood mentioned criticism that "many of the black actors that come to auditons are 'posh Africans' and not representative of all social classes"
This comes after actor Andy Akinwolere complained to The Telegraph that "many talented black comedians and television presenters … just don't get the big breaks" that they deserve.
Now, look in between the lines and it looks like the reason that many of the "posh Africans" are coming over the US for work is because the roles in the UK are extremely typecast. If all the black actors that come in are too posh, obviously the roles that, in your opinion are representative of black people in the UK don't represent them too well. Harwood has gone on record saying that black actors in the UK should go abroad to seek work or continue to struggle. It's a vicious cycle to beat all of the odds stacked up against you by seeking the education and training to get you there in front of casting, only to be turned away because all of the training makes one sound too "posh" for the role. Oh, how a compliment can be an insult at the same time.
[Source: Shadow and Act, The Telegraph]