Random, and maybe I have just missed it for years (granted, I've not read the screen properly for ___ years now!) but I just noticed this text at the top of the seat map when I clicked it after confirming OLCI:
Does this explain some of the annoyed people on FB who have selected their seats only to find them changed when they got to the airport? Why on earth it's 13 hours is beyond me though.... What's the point in "finally" selecting your seat when the aircraft is known if they will unlikely honour anything made within over half of the OLCI time window?!?
Select a seat for the highlighted passenger by clicking available seats on the map below, or type an available seat number into the box next to the passenger name. Finish by clicking 'submit'. Please note some seats are held for assignment at check in.
To honour this request, Online Check In needs to be completed no later than 13 hours before your flight departs. Whilst we will always try our best to meet your requirements, please note that seat numbers are never guaranteed and are subject to operational changes.
Does this explain some of the annoyed people on FB who have selected their seats only to find them changed when they got to the airport? Why on earth it's 13 hours is beyond me though.... What's the point in "finally" selecting your seat when the aircraft is known if they will unlikely honour anything made within over half of the OLCI time window?!?