I am not quite that old but would be interested if somebody knew (a) when they stopped running on Boxing Day (b) when they last run on Christmas Day. There must be a train nerd on here who knows the answers.
No idea, but they are closing all the small signal boxes down and running it from three bridges. They do run trains from Brighton to Vic so anything is possible if enough money is thrown at it. Just to get the drivers and conductors to work overtime now.