On Dec 2, 6:53 am, "Clive D. W. Feather" cl...@on-the-
train.demon.co.uk wrote:

D7666 writes

I'm probably wrong but I thought mirrors are an aid to driver to see
guard but DOO needs CCTV ?

DOO requires a clear view of the entire side of the train. This can be
done through mirrors, CCTV, or a combination.


Thinking more on this since I made that comment perhaps my involvement
with underground infrastructure has confused me ... perhaps we have a
CCTV requirement that national railways do not.

--
Nick