Out of sight, out of mind: that has been the fate of BBC3 since February, when it ceased to broadcast over the airwaves and became solely an online channel.

One hopes its young audience can still find it, because BBC3 has always put out sparky and interesting material. Take this week: it is hard to imagine any of the other BBC television channels showing Being Black, Going Crazy?, a brisk look at the mysterious fact that black people suffer a significantly higher rate of mental illness.

Being Black, Going Crazy? was presented by a man called Keith Dube, who boasted of his legion of internet radio listeners and blog readers. But he had also received outpatient treatment for depression, which he described as “a hollow feeling of worthlessness”.

The programme began with a tendentious statistic, saying that black males were 17 times more likely to be diagnosed with a serious mental health condition than white men. Extraordinary if true: no explanation was given as to how the figure was arrived at. Nonetheless, it is clear that black people are over-represented in the mental-health system.