Well, if you look at the FGW site journey check, it just says one after the other - 'train cancelled'. Not much use to pax is that. A standard 'bus x to y' after each announcement would be more helpful plus assurance that tickets are accepted.Credit where it is due. XC, FGW and NR seem on it today in the SW regarding alternatives and getting repairs organised.
For instance, the general message is that buses are running between Exeter and Newton Abbot but nothing about how you get to Paignton line stations.
So if you just put in 'Torquay and 'Exeter Central' in the from and to, it just tells you 'trains cancelled' -very helpful (not).