I haven't read the replies yet but am so shocked.
This thread appears so racist! These women have a specialist cleaning business for homes in bad condition. It is very specialist and expensive work.
I run a domestic cleaning service and although personally myself and my husband are skilled to do end-of-tenancy cleaning and used to do for years before age made this level of work painful for us and we are now domestic only, we would not be asking or training our domestic cleaning staff to do that kind of work. It required separate skill sets and training, as does hoarder cleaning, as does trauma cleaning.
So what you diminish as 'two black cleaners' are in fact, two highly trained women in business who have skills and training behind them that domestic cleaners have no knowledge of. 
I might add, the staff who work within my company are trained to handle the chemicals we supply and to use effective cleaning methods, it's just a less intensive skill set then the specialist stuff that these ladies tackle. Not many can tackle that sort of jobs correctly, effectively and within the current legislation and that is why these projects can command £1,000 plus.
Also I'd like to add, since I do employ domestic cleaners within my business, I would NEVER discount anyone for a job with us on grounds of race/culture/background etc and why it should even be an issue I cannot fathom. Anyone with a responsible and hard-working attitude to our training will be offered work when we have it available and we pay well.
It's shocking to think that two highly skilled almost 'celebrity' cleaners are diminished in this way.