This quote is from the Head Teachers' Manual 2008 - 09, published by Bucks Admissions:
ô€‚ƒ The tests MUST be administered in the order above (Test B24 before B25) and on separate days.
ô€‚ƒ A minimum of one clear day should be left between the tests.
If the tests were administered by the school, then it sounds very much to me as though this was done for their own convenience, as it is half term.
If, on the other hand, these were tests at a central testing venue ...
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