Thanks for the response Rami Tamimi ^

In between posting my query and hearing from you, I decided to go for 1A whilst still available. I always try for a window anyway, and it's rare (though not entirely unheard of !) that 1A is a 'duff' choice on any aircraft type/carrier.

Note what you say re sky marshall, which presumably (?) explains why 4G doesn't actually appear on the map.

Not relevant to yourself given that you prefer aisle .... but I seem to recall reading somewhere that row 4 is not the best choice for window views (either because it's missing a window, or is 'misaligned' ....?)