A summer road safety initiative targeting those who get behind the wheel while under the influence of drink or drugs has been launched.

Officers from Lothian and Borders Police will be conducting marked and unmarked patrols, as well as holding static road checks in order to catch offenders.

The force will focus on "morning after" motorists who drive while still under the influence of alcohol consumed the night before.

Police will be using a bluetooth transmission device to send a short message to mobile phones with an anti-drink/drug drive message.

The message will be delivered at various locations including shopping centres and at public events.

In some circumstances officers will send letters to the owners of vehicles seen and suspected of drink driving activity even if they have not been traced at that time.

The 'Curb the Danger' letters are intended to act as a warning to those drivers that if they flout the drink driving law, they will be caught.

Superintendent Alan Duncan said in a statement: "There are a variety of events taking place across the force area at this time of year, and we are alive to the fact that this brings an increased potential for offending.

"Although one aspect of the campaign is to focus particular attention on 'morning after' drivers, we have in place a robust and comprehensive enforcement plan which will target roads across the force area at all times of the day and night.

"In addition, we hope to prevent further offending by employing the use of warning letters, and by using our Bluetooth transmitter to get the anti drink/drug drive message out to people on their mobile phones."

He added: "We intend that through a combination of education and enforcement we can reduce offending, as well as getting the message across to the minority of motorists who continue to drink and drive that they will be caught."