The last ever corridor carriages to be built were the Mark 2D FK. These are now obsolete on Britain's railways and I don't even think they were used after privatisation in the mid 1990s. I can't recall Virgin or FGW using mark 2D FKs. Unless anyone knows anything different. Perhaps the last ever corridor carriages to see regular service on Britain's railways were 4CEP formations which were phased out in 2004. Does anyone think that future train/rolling stock manufacturers or TOCs may bring back corridor stock in Britain? The advantages are privacy for passengers especially families etc. Any disadvantages? I can still remember as a kid when the majority of loco hauled stock was mark 1 corridor.