On Tue, 25 May 2010 04:42:28 -0700 (PDT), Mizter T
wrote:

Well, if Haggerston was 'pointing south' then the arrow could be said
to be pointing east - the point of course is that the sign is just a
diagrammatic representation of the routes from that station, rather
than a geographically accurate representation.

Absolutely. It's also pretty straight between there and Dalston in
reality, unlike the diagram.

I think the current signs actually are an 'all over' sticky label
arrangements (i.e. ones that cover the entire sign) - underneath is
the permanent signage which shows both the extensions to H&I and also
to Claphan Jn via Peckham.

Ah, that makes sense.