The British Rail Class 334 Coradia Juniper is a suburban electric multiple unit passenger train built by Alstom in Birmingham.

The trains are operated by ScotRail and mainly run on the North Clyde Line on Helensburgh Central - Edinburgh, Springburn - Milngavie and Airdrie - Balloch services.

[5] On 24 August 2011, ScotRail announced plans to refurbish all the fleet, with the project expected to start in November 2011 and take two years to complete.

[citation needed] From early 2015, Eversholt commissioned Alstom to perform an extensive £36.1m overhaul of the entire fleet to improve passenger conditions, which included the retrofitting of full air conditioning, at-seat charging points, provision for wi-fi, passenger counting equipment, cycle spaces, LED lighting and CCTV in the saloons, and an upgraded CCTV system for driver-only operation.

On 22 June 2021 during Pride Month in the United Kingdom, a Class 334 was unveiled with progress flag colours.