On 25 Nov 2009 Chris wrote in

m:

On 24 Nov, 18:16, Graham Drabble wrote:
On 23 Nov 2009 David Jackman pleasereplytogroup wrote
innews:Xns9CCCE1F
:

is actually rather misleading on this point? *It's title is
"Oyster rail services in London" yet Hayes to Heathrow is shown
in exactly the same style as Paddington to Hayes. *Likewise the
line style doesn't change at Hayes so a quick glance suggests
Oyster will be valid to Slough; yes, there is a note saying it
isn't but the use of (say) a dotted or feint line would make
this much clearer. *

As a brief point to this, they Paddington-Slough line would
actually need to change at West Drayton not at Hayes.

Why's that then?

Oyster PAYG is available all the way to West Drayton. So if the map
was differentiating routes that can be used with Oyster the change
occurs at WD not at Hayes.
--
Graham Drabble
http://www.drabble.me.uk/