Labour's policing chief has said she's "keen" to explore rounding the tips of knives as a measure to stop fatal stabbings - as suggested by Idris Elba. Sarah Jones told The Mirror that removing the sharp tip from kitchen knives is an "interesting idea" with evidence showing it could make a big difference. She also said knife arches in schools can be a "useful tool" - but said it is up to headteachers to decide if they want to use them. The devastated parents of murder victim Harvey Willgoose