It has been confirmed today that Tony Blair's aide Ruth Turner has been arrested by police investigating the cash for honours corruption scandal. Blair himself became the first UK Prime Minister to be interviewed by police in the same investigation. The police visited Downing Street on the same day the outcomes of the investigation into the death of Diana Princess of Wales were dominating the news.   Ruth Turner is not the most important or well-known of Blair's "spin team" but she is someone very very close to the Prime Minister and the heart of government. Her official title is Ruth director of government relations. In reality she is known as "The Gatekeeper" as minor politicians have to approach her before they can reach Blair. It is rumoured that she is much despised by backbenchers, who see her as coming from the unacceptable face of New Labour control freakery.   It will be interesting to see how long Blair can continue letting others take the rap for him. Presumably it is only a misguided sense of loyalty that is maintaining the wall of silence that police seem to be facing.   Ruth Turner has now been released without charge after being questioned.   In Iraq a top aids of Moqtada Sadr has also been arrested. It is a bad day for firebrand leaders! In somewhat deeper water than Ms Turner, this aide is thought to be involved in the Mehdi army's alleged campaign of sectarian killings.   del.icio.us tags: blair, aide, ruth, turner, cash, for, honours, row, investigation, met, police, arrested, spin, doctor, gatekeeper, interview, question, bail, release