Those who carry knives are being urged to surrender them in a bid to tackle knife crime. 

Knife surrender bins have been placed at 16 police stations across the Thames Valley, including High Wycombe and Amersham, as part of Operation Sceptre. 

As part of the national operation, the bins will be in place between July 17 and 23. 

Thames Valley Police is asking that all knives that are deposited in the bin are safely wrapped in tape and newspaper.