(23 Feb 2020, 10:29 am)scanialover wrote I could be, and happy to stand corrected here. How I got to my figures - a round trip M'bro to Scarborough is just over 100 miles, then a short - Whitby to Scarborough, which forms part of the X93 is equal to approximately 20 miles. From there I picked up the peak season X93 timetable and made it that there are/were 15 through journies and 15 short. That gave me a daily mileage, operated across the timetable and involving a number of vehicles, of just over 2000 miles a day; the rest in terms of weeks, months and years should (??) be academic. I wasn't trying to look at the one vehicle, just the timetable overall. Like I said, I could be wrong!

Worth remembering though that during the summer they bring in some extra deckers to operate all of those runs - and that only 5 out of 6 are required for the PVR the rest of the year. 

I'd reckon that at an absolute maximum, for the batch, you're looking at 3.5m miles. But then breaking that down to per vehicle, it's about 580,000. 

As a rough comparison:

Say a bus stays on the Newcastle to Ashington X22 all day (ignoring the X21 interworking, but that adds only about 5 miles per trip). 

Each round trip is 40 miles, at about 6 trips per day - more than that if they stay onto the evenings. That's 240 miles per day. 

The 14 plate E400s, or at least 7524-8, assuming that roughly half of their time has been spent doing Sundays and evenings, then you get to a figure of over 500k per vehicle over their 5.5 years - and that's excluding how frequently they get put on the X14/5/8 nowadays.