To ask the Prime Minister what official channels exist for members of the security services to flag up concerns over the interpretation of raw intelligence data to the chairman of the Joint Intelligence Committee. 
There are established procedures by which the views of members of the intelligence and security agencies are relayed to the JIC. Before a paper is taken by the JIC, it is discussed at working level and then considered more formally during inter departmental meetings (called Current Intelligence Groups or CIGS) at which representatives reflect the agreed views of their agencies and Departments. If outstanding issues remain, staff are expected to raise the matter with their representative on the JIC who will bring it to the attention of the committee when appropriate. Additionally, staff in the security and intelligence agencies are able to take any concerns or grievances they have, and which they have been unable to resolve within their internal management chain, to the staff counsellor who acts as an independent adviser.