In his evidence to the Hutton Inquiry, Assistant Chief Constable Michael Page coyly refers to discussions with the head of Thames Valley Police Special Branch but omits naming him.
The identity of the Head of Thames Valley Police Special Branch in 2003 has been a minor mystery.
A recent article in the Mail on Sunday appears to have identified the individual concerned: Gilbert Houalla, currently a Superintendent with Thames Valley Police, it seems.
The Daily Mail article also alleges that there was a relationship between (now) Chief Constable Sara Thornton and Superintendent Houalla.
The online version of the Mail on Sunday article, as I think it is, is here: Woman chief constable's relationship with married officer she took to banquets at Windsor Castle.