Train Door Solutions designed and supplied an improved external plug door control system for Class 153's in 2003. The project was sponsored by Porterbrook Leasing to integrate into the C6 overhauls for Anglia Railways, London Midlands and Northern Rail. In 2004, Angel Trains implemented the upgrade on the Wales & Borders fleet.

TDS were able to overhaul the door mechanism with new bearings, guide rollers and lock parts. All the components have proven service history. The parts from TDS have improved the reliability and performance whilst maintaining the functionality and safety of the system.

The AEA Technology independently reviewed the door system improvements against mandatory requirements and granted engineering acceptance.

The parts are provided with a full 12 months warranty.

The scope of supply for the improved door system includes the following parts:

• Door Actuator
• Door Control Plate
• Door Switch
• Lock Actuators
• Lock Switch
• Obstacle Detection Pressure Switch
• End of Stroke Switches
• Filter and Regulator Unit
• Valves for Crew Access Door
• All necessary Fittings and Tubing
• All Mounting Brackets and Fixings