during the night of 18–19 december 2009, there was heavy snow causing widespread disruption to roads, railways and airports across northern europe. five trains (one of which was 373217 + 373218) broke down inside the channel tunnel because snow in the engine compartment was melted by warmer temperatures in the tunnel, the resulting water causing electrical and control system faults. eurostar commissioned an independent report to evaluate what went wrong and how future events could be prevented or better managed. the report's recommendations included: