It is important to point out that the Missions are an integral part of the Ministry and thus has to operate under its guidance and instructions. While they are managed by a Head of Mission with relative autonomy, they nevertheless are subordinate to the Permanent Secretary and must thus seek his/her approval on some procedural and non procedural matters.
Indeed, as a legitimate part of a Team, there exist a good working relation between the Missions and the various other Departments in the Ministry.