(28 Jan 2015, 3:10 pm)Dan wrote then an incredibly loud vacuum-like noise came on for about a minute or two
Extractor fans to remove smoke if they was a fire with it being an enclosed station. They will be activated manually, with a power cut or a fire alarm activation. They sometimes turned on in Sunderland Central if a smoky Grand Central HST is coming in to prevent the fire alarms being activated.