questionText: To ask the Secretary of State for Transport, with reference to page 211 of his Department’s annual report and accounts 2022 to 2023, HC 1476, in which Network Rail property the fire occurred; and what its cause was.
answerText: The fire occurred in an old depot building in Northampton. The source of the fire was from one or more LED Lenser Lamps work lights which were charging and contained lithium-ion batteries. The fire started as a result of thermal runaway. 
heading: Network Rail: Fires