Dear Mum of Sick Child
I would get that checked. See following link.
http://www.buckscc.gov.uk/schools/docum ... r_2008.pdf
Section C part 2
"For any child absent on the day of a test please advise the parent, in advance, of the rescheduled test date and ensure the child sits the tests in the correct order"
Section C part 3
"Before commencing the tests ensure that the test number on both the test paper and answer sheet are correct. REMEMBER all pupils must sit the tests in numerical order â€“ B22 before B23."
Section C part 5
"REMEMBER - All candidates MUST sit the tests in the correct order and on separate, nonconsecutive, days."