On Mon, 26 Oct 2009 14:43:21 -0000, Basil Jet wrote:

Routeing validators launch from 6 September 2009 as does the
associated multiple fare option. These validators will be identified
by having a pink oyster pad rather than the familiar yellow one.

Is that the only distinction? How are the colourblind supposed to tell them
apart?

There's a sign next to them saying something like "Oyster Route
Validator".

I don't have a picture but I'm sure someone will be along with one
shortly.