 Police forces may advise fire brigades of the presence of the convoy if it is moving into the vicinity of a fire brigade operation.Details of nuclear warhead convoys are kept secret by the UK government and the MoD who operate a "Neither Confirm Nor Deny" policy on informing the public regarding convoys.Evidence given by the Nuclear Information Campaign to the Defence Select Committee (based on figures from campaign group Nukewatch UK for 2000 to 2006) give the number of convoys as ranging from two to six return journeys per year from Aldermaston to Coulport.