They are particularly interested in Turkish-manufactured top-venting blank firers which are now illegal to possess.

The amnesty will start on Monday and last until the end of February.

After this, anyone in possession of a TVBF could be subject to prosecution and up to 10 years in jail.

Top-venting blank firers are legal to buy in the UK without a licence by over 18s unless they are readily convertible.

However, tests have shown that models produced by four Turkish manufacturers are readily convertible and therefore illegal.

The prohibited brands are Retay, Ekol, Ceonic, and Blow.

Top-Venting Blank Firers can be handed in at the following police stations across Surrey:

Guildford Police Station, Margaret Road, Guildford, GU1 4QS (open daily 8am-10pm)

Staines Police Station, Kingston Road, Staines, TW18 4LQ (open daily 8am-10pm)

Caterham Police Station, Timber Hill Road, Caterham, CR3 6LD (open daily 8am-10pm)