If the sea wall breaches then far more than just the railway goes. I'd be more inclined to think someone will build another wall in front of the current one ( or put a heck of a lot of rocks down ).
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Turning the old St Davids through line into a platform line by building out is intriguing - what would you be running into the new bay? presumably Exmouth-Paignton and build out P3? if we assume that might go to 4 cars one day I... actually haven't worked out what the remaining platform length would be. Should leave enough space for expansion of WoE services at least & it'd be enough to turn round Barnstaples or 5 car IETs I guess. I take it the hill being there makes splitting P3 without building anything frowned upon.
I forget, are the lines up to Central reversible?
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Turning the old St Davids through line into a platform line by building out is intriguing - what would you be running into the new bay? presumably Exmouth-Paignton and build out P3? if we assume that might go to 4 cars one day I... actually haven't worked out what the remaining platform length would be. Should leave enough space for expansion of WoE services at least & it'd be enough to turn round Barnstaples or 5 car IETs I guess. I take it the hill being there makes splitting P3 without building anything frowned upon.
I forget, are the lines up to Central reversible?