When asking for seat blocking I was told it's only available for SENs and HONs. And since I checked in as UA*G, the seat wouldn't be blocked....
That's agent's talk - I am talking about real experience of FTers. I am much convinced that the LH IT leaves the agents equally in the dark as it does the customers.
Statistically, I myself had a lot more luck with seat blocking as UA*G than as SEN ... but then that is me