the LNER system is quite polished and you can just do a separate reservation if you want to buy your tickets elsewhere).
Yes, I agree 100% .. the LNER system works well .. you can look at the train layout and pick the seat(s) of your choice from the available options.
Unfortunately, it's not the same with TransPennine Express. I was trying to book tickets from their own website for a journey in November (tickets were not yet available on the RailUk site) but was unable to get two table seats together. You have to click on your preferences .. window, table, airplane seats etc, then the site allocated two seats which you can accept, or try again. After several attempts, I gave in and phoned TPE. Their suggestion was just to book any seats, then phone them and they would change the booked seats on their system. In the end, everything worked OK .. booking, telephone call, change of seat .. but it just seems the LNER system is much better.
let's just hope, after all the effort, my TPE doesn't get cancelled.
Liverpool Lime Street to Newcastle, Nov 2nd at 16:24