A protest march tomorrow will be "damaging" to Oxted School if pupils are involved in it, warns head teacher Nicola Euridge.
Hundreds of parents - possibly accompanied by some students - will march from Master Park to the school at 9.15am in protest over its foundation/academy plans.
Ms Euridge said: "It would be disappointing, deflecting and even damaging to the school if these actions disrupted the education of the students by involving them or bringing this protest to the school.
"The usual sanctions will apply to students who are late (after 8.45am), or absent themselves from school which would then be recorded as unauthorised absence."