This has been on my mind again after clocking the edgy, aggressive young gentlemen drinking their pints of lager a hundred yards away from my front door.  Goes hand in hand with 'The Visual Illiteracy Of The English Male': the would-be 'casuals', carrying on that tradition of UK tribalism.  Little interest in anything beyond their immediate comprehension.

It also strikes me it’s a look that’s very comfortable (maybe happiest?) in its own company. Rather than gathering in groups for security and lager.
If we’re talking tweed and corduroy - there’s something very introverted about that?

A look I'm returning to/redeveloping, having taken decisively against the G9, G4 or anything remotely resembling them (McGregor Drizzler, for example).  I'm also rather weary of polo shirts and have kept only two back, a navy Cross Creek and a navy (L/S) Peter Geeson.  I've been examining my remaining Brooks shirts and thinking of buying ties again.  The Imperials and cordo wingtips will come back into service, as will the grey herringbone soft shoulder two-button jackets and pressed chinos or cords. 
Not so much a 'college look' as a post-college, Mary McCarthy, Yale kind of look.  It will bore many.  But I believe our Japanese friends would understand.

I'm delighted that this kind of look meets with Horace's approval; would like to hear more from him in due course. 
It might have proved a 'Stopped Clock' look when I was still actively involved in the Great Education Racket (AKA 'Forcing Some Knowledge Into Bone-Idle And Ignorant English Children'), and used to travel by train to examiners' meetings etc.  One rather fades into the background in some ways whilst catching the eye - sometimes mildly inquisitive - of others.  I believe the repp tie (or something similar) seals the deal.