This is a category of membership designed to offer support to Heads who are actively seeking to meet all the criteria for Full or Dual Membership, or are part of a "Diamond Structure" whose Principal is a member of the Society or a member of another association.  It is also open to those in transition to 16 + with the expectation of a sixth form.

This category also encompasses the Heads of those independent schools who are waiting for an ISI accreditation inspection commissioned by the Society.  The Committee has also put a cap on the size (no more than 1000 pupils) on the schools whose Heads are seeking Alliance Membership.

Alliance Members are entitled to:

• Access all the support services provided by the Society and to attend the Annual Conference and other Society Meetings.

• Alliance Members may not be elected as Officers of the Society or as Committee Members, nor are they entitled to vote at the AGM/EGM.