Coming back to the original topic of seat selection...I was told by a WS agent that when a ticket is procured through a TA then the booking is '''locked" and that's why you can't book a seat on the WS website. You have to call in for the TA to select a seat. Also the same as if you have to modify a reservation - can't do it on the website, have to call WS or go back to your TA. So while it is a bit of an odd thing and yes WS' website could be more informative, we also need to pester the TAs (Egencia in my case) to findfind why THEIR system won't let us book seats in the first place.