Siemens In Partnership with Intertrain

“https://www.safety.networkrail.co.uk/Alerts-and-Campaign/~/media/Home/New%20Structure%2017%20apr%202013/Alerts%20and%20Campaigns/Infrastructure%20Group%20Bulletins/2015%20alerts/NRA%2015_06%20Safety%20Advice%20-%20Safety%20critical%20failures%20of%20link%20trolley%20brakes.pdf”