The purpose of this post is simply to flag up what is in the public domain from the Parliamentary realm with a view to examination of other aspects of Operation Rockingham in future posts.
The publicly available information is extremely sparse.
David Kelly mentions his Operation Rockingham activities here in his evidence to the Intelligence and Security Committee on 16th July 2003:
ANN TAYLOR: Can I ask, at the beginning you mentioned that you do see certain
intelligence reports but you haven't been very specific about that, can you give us some
idea of what you see by way of JIC papers, what you see from DIS, you mentioned that
you did see some intelligence reporting could you give us a fuller picture please, of what
they might be?
DR KELLY: Certainly. I see all the intelligence reporting concerned with both Iraq
and ***; with regard to chemical and biological weapons, that arrives in the Proliferation and Arms Control Secretariat and I have full access to that. Within the Defence
Intelligence Services I liaise with the Rockingham cell which used to service UNMOVIC
and UNSCOM and now will service the Iraq Survey Group and I don't go through all the
information that they have but, almost on a weekly basis I'll sit down with the principal
officer there and he will alert me to anything that he thinks is of relevance to my work. I
also liaise with SIS, they call me in if they want to discuss any raw intelligence with me
or if they want any assistance in interpreting intelligence . I see them every two months
Normally, the preceding information would not have been available in the public domain.
Remarkably little has ever been disclosed to the UK Parliament about Operation Rockingham.
Operation Rockingham may have started as UNSCOM inspections in Iraq, see the following testimony to the Defence Select Committee here:
1546. I know the experience. I gave evidence to a Committee yesterday and I was constantly being passed notes by the clerk. I did not read one of them, I might tell you!
(Brigadier Holmes) I am grateful for the sleight of hand on the part of the person behind me! Small numbers, mainly specialists, serving Operation Warden, which is deterrent forces covering Northern Iraq; Operation Jural, which is the no-fly zone over Southern Iraq; and occasionally Operation Rockingham, which is UNSCOM inspections in Iraq itself. So it is mainly specialists and the chap who caught my eye is an officer on UNSCOM inspections in Iraq.
On 12th January 2004 the following written answer about Operation Rockingham was given:
Harry Cohen: To ask the Secretary of State for Defence what the role and function is of the unit set up under Operation Rockingham; what its cost was in the last financial year; and if he will make a statement. 
Mr. Ingram: Operation Rockingham was established in 1991 to provide support to UNSCOM inspections in Iraq. It has subsequently also supported UNMOVIC
12 Jan 2004 : Column 538W
inspections and currently supports the work of the Iraq Survey Group. In the last financial year (2002–03), the cost of the team was £78,723.53.
In 2006 there is the following written answer about Operation Rockingham:
Lynne Featherstone: To ask the Secretary of State for Defence what the present functions are of Operation Rockingham; how many staff are employed on it; and if he will make a statement. 
15 May 2006 : Column 664W
Des Browne: The Operation Rockingham cell is working on residual issues relating to Iraqi WMD and analysing the lessons learned from the Iraq survey group deployment. It consists of three people (two part-time and one full-time).
There is virtually no information relating to what Operation Rockingham was working on in the crucial period leading up to the pretext for the Iraq War propagandised by Tony Blair and Alastair Campbell in 2002/2003.
Note, above, that David Kelly says the following in the (expected to be) private hearing at the Intelligence and Security Committee:
I see all the intelligence reporting concerned with both Iraq
and ***; with regard to chemical and biological weapons, that arrives in the Proliferation and Arms Control Secretariat and I have full access to that.
But wasn't his public position that he didn't know about or hadn't seen the intelligence behind the 45 minute claim in the September 2002 dossier?
Which makes me wonder about the veracity of his evidence to the Foreign Affairs Select Committee on 15th July 2003.