I live in Bromley SE London and I'm wondering, why do the heathrow-bound aircraft coming from the west, fly in a large U shape over my house??
Well... I'll reply from the pilots point of view rather than all of these Tower geezer types. It's easier to fly a 'U' shape than an 'X' or 'F'... Too many 'g' in the pull through to the middle slash bit....
'W's are okay in an F16, but a bit of a bugger in a 340......... We 340 guys like the 'L' or 'I' shapes


Hope this helps