More than 400 knives were handed in to police during a knife amnesty in July.

This is twice as many as were surrendered during the last week-long police knife amnesty, held in November of last year.

All of the knives and bladed items will be destroyed.

Figures from Cornwall, where knives could be handed in at police enquiry offices in Camborne, Bodmin, St Austell and Truro, show that 68 items were handed in.