Can a sixth former in Lower 6th be temporarily excluded from school?

Yes, a sixth former in Lower 6th can be temporarily excluded from school. While sixth formers are generally treated with more autonomy than younger students, schools still retain the right to temporarily exclude them for serious breaches of school rules and regulations. The specific grounds for exclusion will vary depending on the school's policies, but could include things like serious misconduct, violence, drug use, or persistent disruptive behaviour.