He must have known about BK otherwise his cabinet which includes the Minister for Justice who is in charge of the prison service is asleep at the wheel. I don't believe he didn't know.
However, the signals are brilliant. He was always a straight talker and while his star is fading a bit now, he could make a resurgence if he keeps the mammies of Ireland onside with the Gender Equality proposal for the Constitution and the schools curriculum. The danger lies in the proposed constitutional amendment I think, because while ostensibly it intends to bring equality to all who work in the home, the definition of those people may be problematic and controversial. But we shall see.
I have to say I am delighted to hear him say what he has said about women's prisons. Loud and clear no fudge.