The largest deployment of special constables "since World War Two" will take place on the streets of Glasgow and the west of Scotland this weekend.

An army of volunteer police constables will patrol their communities as part of a Safer Scotland campaign to tackle knife crime and violence.

About 100 special constables will be deployed on Friday and Saturday night.

Sgt Bob Fitzpatrick said: "This is a significant deployment throughout the Strathclyde Police force area."

Special constables were first used in the 19th Century.

Strathclyde Police has about 300 specials who have similar powers to regular officers.

The main difference is that they work part time, fitting in special policing with other work or commitments.

Sgt Fitzpatrick added: "Their role is to improve community wellbeing and address violence and knife carrying.

"It is about public reassurance.

"Special constables know community fears and concerns, they are a valuable resource."