Phil Verster, NR Managing Director for Scotland was interviewed around 1730 on Radio Scotland this evening and amongst other things said that repair would include building a new pier to share the load with the now weakened original. He was non-commital, though one might say 'aspirational' on 1 Feb. Those who know something about bridge engineering more than me will know better than me what to think.
I'll take a stroll down the street and see what the TPE train does at Lockerbie tomorrow. The north end crossover has been used in similar circumstances before, though the current timings certainly allow for Beattock if more convenient.