The school can confiscate the phone, however they cannot delete anything in the phone, not without a court order
See also 'schools must have parental consent for a detention', also not true.
To quote cauliflower:
- Statutory guidance for dealing with electronic devices
• Where the person conducting the search finds an electronic device that is prohibited by the school rules or that they reasonably suspects has been, or is likely to be, used to commit an offence or cause personal injury or damage to property, they may examine any data or files on the device where there is a good reason to do so. They may also delete data or files if they think there is a good reason to do so, unless they are going to give the device to the police. This power applies to all schools and there is no need to have parental consent to search through a young person’s mobile phone if it has been seized in a lawful ‘without consent’ search and is prohibited by the school rules or is reasonably suspected of being, or being likely to be, used to commit an offence or cause personal injury or damage to property.
• The member of staff must have regard to the following guidance issued by the Secretary of State when determining what is a “good reason” for examining or erasing the contents of an electronic device:
• In determining a ‘good reason’ to examine or erase the data or files the staff member should reasonably suspect that the data or file on the device in question has been, or could be, used to cause harm, to disrupt teaching or break the school rules.
• If an electronic device that is prohibited by the school rules has been seized and the member of staff has reasonable grounds to suspect that it contains evidence in relation to an offence, they must give the device to the police as soon as it is reasonably practicable. Material on the device that is suspected to be evidence relevant to an offence, or that is a pornographic image of a child or an extreme pornographic image, should not be deleted prior to giving the device to the police.
4
• If a staff member does not find any material that they suspect is evidence in relation to an offence, and decides not to give the device to the police, they can decide whether it is appropriate to delete any files or data from the device or to retain the device as evidence of a breach of school discipline.
• All school staff should be aware that behaviours linked to sexting put a child in danger. Governing bodies should ensure sexting and the school’s approach to it is reflected in the child protection policy. The UK Council for Child Internet Safety
No court order needed.
But sure, let's tell kids they can harass vulnerable kids in their year and plaster photos of children who may be on the child protection register all over the place and nothing can be done because there's no court order.
It's what I said upthread, this 'but me and my supposed rights... no responsibilities, you can't do...' goes hand in hand with a minority of students thinking they are beyond basic rules.