You can apply for your child to have time off for a holiday during term time, but headteachers will only approve this in exceptional circumstances.
Exceptional circumstances
All schools can grant a leave of absence for exceptional circumstances at their discretion.
In the case of schools maintained by local authorities and special schools not maintained by local authorities, it must be requested in advance by a parent who the pupil normally lives with.
Schools are then expected to consider each application individually. They will take into account the specific facts and circumstances and relevant background context behind the request.
If a leave of absence is granted, it is for the school to determine the length of the time the pupil can be away from school.