The war between the ARB and the RIBA over the board's perceived 'empire-building' has further escalated after the institute's president-elect, Jack Pringle, sent a furious letter to ARB member Alan Crane.
Pringle - who until recently was vicepresident for education - attacked the ARB for intentionally 'discrediting' the RIBA's system of school inspection panels.
He also sent the letter, which has been leaked anonymously to the AJ, to all board members, the heads of schools organisation SCHOSA and the ODPM.
The letter is set against a growing row over the ARB's comments about the effectiveness of the RIBA's education validation system. At the last board meeting, members launched a searing attack on the institute's inspection panel results.
Pringle's letter attacks the ARB's staff for choosing to exclude institute representatives from meetings with schools, and hits out at the decision to validate at least two schools before the RIBA's inspection panel had reported.
'We could only interpret your actions, ' the letter says, 'as those intended to unfairly discredit our established and well-regarded system? in order that you had further reason to disregard our reports submitted to you by the schools as part of their application for ARB prescription.' The ARB registrar chose not to comment on the letter's contents.