National Association of Head Teachers general secretary Mick Brookes said the survey findings contrasted with previous research showing very few middle managers aspired to headship.

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Mick Brookes, general secretary of the National Association of Head Teachers, said bursars were being used "to take away some of the bureaucratic work" from heads.

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The general secretary of the National Association of Head Teachers, Mick Brookes, also said he hoped the DCSF had learnt from "the complete mess" it had made of the announcement of the secondary scheme.

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