After a day at the races – where I lost every race – I am collected by the Beeb for a late night interview on the DNA issue I have been pursuing. Difficult issue – but when I get into the studio the presenter tells me and the audience that the Met have refused to put someone up for interview but have sent a statement to be read out.

In the statement they say that they are conducting this voluntary scheme asking black men between the ages of 25 and 40 to come forward to give a DNA sample to be eliminated from the police investigation into a series of rapes in South London. Towards the end of the statement they refer to only having to have arrested three people. That is my point – how voluntary is it if you refuse and are arrested because you refuse?