The current test includes verbal and non-verbal reasoning, which are not taught in primary schools and need coaching but the new test may drop that element and place the emphasis on English and Maths, which are taught in classrooms, BBC South East Today's political correspondent John Young explained.

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Only a third of the applicants pass the harsh written exams, which test math, logic and analytic reasoning.

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To put Lydia's mark in perspective, the top adult score in the Cattell III B test, which primarily tests verbal reasoning, is 161.

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The new test will be less predictable and include verbal reasoning, numerical and visual communication parts.

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Staff reflection and analysis of test scores, however, revealed that students had reached a plateau in the development of quantitative reasoning skills.

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