RealTimeTrains nowadays also seems to show either “LNER Azuma” or “LNER InterCity 225”, in the detailed view at least
Just a word of caution that a timing load, as shown in realtime data sites, doesn't inherently indicate planed traction, however in the case of LNER, the timing loads do generally match up what is planned.
I’m travelling to Leeds in a couple of weeks. Is there a way of finding out which type of traction LNER will be using? I haven’t booked anything yet, but I’d prefer to travel on the 225 rather than the Azuma. I will be travelling on either a Monday or a Tuesday.
When you do book, if you book either with us (for any train company) or with LNER (for travel with LNER), you would be able to choose your seat (subject to the facility being available).
A seat selector facility is another way to see the planned traction, as the seating layouts are very different, as well as differences in coach lettering.
However, changes can happen, so if you want to be sure of getting a 225 you'd need to be using a flexible ticket, and be prepared to change your travel plans in case of any set swaps on the day.