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There is a constant pressure online, Tilly said, and despite trying to adjust the way she interacts with content so it does not appear on her feed, she said it was "almost impossible" to avoid.

For years, Snap has envisioned a future where people wear glasses to view and interact with computer-generated images without having to scroll through their smartphones.

All school staff — not just the school police — have received training in how to interact with immigration agents, especially to limit their access to campus and children.

Alfie Ford, a former Forest Oak pupil, was not targeted by Clarke but said he was "shocked, disappointed and angry" as he previously interacted with the teaching assistant most days.

"Having a sense of my community and understanding the context of who I am historically, politically, socially, emotionally - that has changed the way I interact in the world."