I am grateful that the new UI includes expected service timings, but the implementation isn't the smoothest. One Class 66 freight run on good old GWE is forecast to last some 17 hours!
"Hello signaller, you do know I've been sat in Kennet Bridge Loop for 15 hours?". "Wait the signal driver, got a few to get round you."
Can’t recall which services but I’ve seen some that estimate around 5 or more hours. Probably part of this same issue
Some services display time it takes to complete them, other show either starting time or duration from the service start to midnight. I haven't figured out which, but I saw some services with 18+ hours