This x 1000.Two drivers to run two trains? Where are they going to get those two drivers from to drive just one train each, and who is going to organise that?
Its not only just drivers who are isolating, its staff who arrange the train service - and its a major task to do a rewrite, and there aren't staff sitting around to do timetable rewrites at short notice
There aren't resources to keep rewriting timetables weekly. Best have one plan, even if it is slightly unambitious, than no let up in the planners' workload (remembering that in all of this T12 it still being recovered)