This train will be among those wrapped in advertising

First ScotRail trains will become giant mobile billboards wrapped in the livery of an advertiser under a deal signed with Viacom Outdoor.

All three carriages of trains on the Glasgow to Edinburgh, Aberdeen and Inverness routes will be branded.

A spokesman for Viacom said wrapping trains was an "exciting proposition" for advertisers.

Ross Barrett, impact account manager, said: "These wraps will deliver enormous brand exposure and offer advertisers a fantastic creative canvas to reach consumers on the move in key conurbations across Scotland."

Peter Williams, First ScotRail's commercial director, said: "There is a demand for businesses to find new and effective ways to reach their target audiences.