I remember reading that the GNER/BR timetables for the ECML had most trains timed for IC125 trains, even if diagrammed for an IC225 set, so that IC125s could stand in for a failed/unavailable IC225. The exception was a few of the fastest services, such as the 'Flying Scotsman'. Is East Coast's current timetable the same or are all services booked for IC225s now timed to take advantage of the 91's superior performance compared to their diesel counterparts?