Alan Jones aired “serious concerns” about RIBA chief executive Alan Vallance’s performance two weeks before details of his alleged extra-marital affair were leaked to the press, the institute’s former honorary secretary has claimed.

The RIBA said it was investigating Jones’ complaints against Vallance, but he is said to be angry that it has taken so long for his complaint to be looked into.

Meanwhile, a separate complaint, lodged by the former honorary secretary, Kerr Robertson, has been closed by the institute. The RIBA said this was because Robertson refused to agree to the proposed investigation process. He said he objected to Jack Pringle, the chairman of the board, overseeing what he felt should be an independent investigation.

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