List of Matrix participants for Oxfordshire 2005. The fee for this Matrix was Â£3,950 plus VAT. A fee largely paid by the taxpayer. CP uses a system where they 'top up' courses by giving preferred people cheap places. All of these people will have been taught under the Chatham House rule where neither the speaker (of a subject) nor the meeting must be revealed. Participants network under Chatham House rules as 'future leaders'. They have been taught to drive CHANGE, but change from what to what?