It is called Off Rolling when parents are coerced to remove their children from the school register or when they are simply removed without parental consent.
Schools do this when children present them with challenges such as; attendance, behaviour, projected poor achievement or SEND's, which the school is unable or unwilling to meet.
If home education has been misrepresented to you by a school, or your child has been off-rolled without your consent, please contact me with the details in confidence. Thank you. You should also contact your Local authority and explain what has happened. If they fail to help you can approach your MP. If you still have problems, you should get legal assistance.