Commuting between Brighton and London just seems like less and less a sustainable option anymore, despite the pitifully small distance in a straight line between the two points. Almost feel genuinely sorry for the DFLs.
This. How long before the Balcombe Tunnel or the viaduct just north of Haywards Heath start to become unsafe? First time either of these things happen, or one of a dozen other Single Points of Failure, er, fail, then BML1 is completely snookered longtime.