Edinburgh bus drivers are to be issued with DNA kits in an effort to catch people who spit on them while they're working.

More than 1,800 employees at the city's two main bus firms are to be given the kits to secure evidence and encourage more reporting of incidents.

About one driver a week is reported to police as having been spat on, although the actual figure is believed to be twice as high because many incidents go unreported.

The move, instigated by Lothian and Borders Police, follows the introduction of the "spit kits" on the London Underground, ScotRail services and on some buses in Glasgow.