Bugging Of Sadiq Khan, Labour MP

Gordon Brown's staff are saying "we didn't receive David Davis's letter about MPs being bugged by the security services", but that misses the point.

Say Brown didn't know this was happening. Why not?

Shouldn't the PM know if the Wilson convention (no bugging of MPs) was out the window? To paraphrase the Watergate hearings, what did Brown know, and when did he know it?

What did Jacqui Smith know, and when did she know it? Or did she not know, and Sir Ian Blair had not told either of them? Or maybe the anti-terrorist squad at Scotland Yard didn't even bother to tell Sir Ian?

It's all very Rumsfeldian -- "As we know, there are known knowns. There are things we know we know. We also know there are known unknowns. That is to say, we know there are some things we do not know. But there are also unknown unknowns, the ones we don't know we don't know."