But what will be interesting is the mix of the signalling problems and the new timetable. Under the old timetable, services could often make up time once they'd got through the problem area. Now a lot of the slack has been removed that "elasticity" is no longer there.
And of course there's more trains being squeezed in, meaning congestion builds up quicker when there is a problem such as this morning.
It's not all doom-and-gloom though as there is still recovery time in the schedules, not as much as before, but still some. A good example is the 09:28 Paddington to Cheltenham train this morning, which was delayed by 28 minutes leaving Paddington, but even on a schedule that's a whopping 14 minutes quicker than the equivalent 09:36 departure in the old
HST▸ based timetable, it got to Cheltenham just 15 minutes late. So an old schedule of 2h 16m, was bettered by 27 minutes, being completed in 1h 49m, 13 minutes quicker than the current schedule.