Today, a 15-year old was fatally stabbed with a knife by a fellow pupil at a Sheffield secondary school. The perpetrator is being held in custody having been charged with murder. Inevitably, the cry has begun, again, for secondary schools to install metal detectors.
I think on balance they should be installed. While they are a constant and visible reminder of the possibility of schools being very dangerous places, they also have a role in helping keep young people and staff safe.