Originally Posted by
teflon
Don't think that would make a difference - you still can't select a particular seat, other than using stut's method.
You could try using that technique to get a seat you vaguely want - then when you've got some time to spare, take it to a station and ask nicely for a new reservation coupon.
You can go to the station up to the night before the trian leaves.
We used trainline a couple of years ago. I just cant remember if you could be as specific as you need on the seat location.