Please look again at Atticus's entry. He hasn't even mentioned the sex of the assailants. Black is the first descriptive word he has used to describe them.
I agree this is terrible. However, is it really necessary to note their enthnicity. Surely if anyone saw anything three males attacking a female would be sufficient to prompt any witnesses to come forward.
How great M and S in East Dulwich. It'll give all the local doley population something to do with their time, they'll have to get the free bus to Peckham to do their shopping to buy a meal for 8 for ?3!