There's a lot of navigation around at the moment. The future apparently is micro processors telling you (and everyone else) where you are.
But, today, let us concentrate on the posters.
I'm pretty sure that BT have absolutely no idea where anything is, but they're jumping feet first on to the band wagon.
Aside from that insipid blue what I really hate about this is the London Eye compass. Actually, using that circle for a compass isn't a bad idea, not necessarily a good idea, but certainly not a bad one. That shape says London and it says compass - that makes sense.
But we all know what a compass looks like don't we? And that funny star shaped thing in the middle, that thing you only get on compasses, that reinforces that it's a compass, doesn't it?
It's a horrible font. It doesn't sit comfortably in the composition and it doesn't feel like it points North. Look at it again in the top picture. It looks like a mistake.
Further proof that what you leave out is as important as what you put in.