That Vic line smell..

New trains?

AFAIR the Vic was the first tube line built with pre-planned forced air ventilation which in itself created heat as accelerating trains tried to compress the air in front of them as they reached the tunnel cones which were unique to the newly built Vic. There was also perhaps more asbestos built into the Vic than any other line and neoprene was used in all the equipment rooms too as well as in tunnel fixtures. There always was a distinctively different smell to the Vic, more melted plastic than tunnel dust as the new line aged over the years and all the equipment cooked in its self produced heat.