On Dec 17, 10:13*pm, Christopher A. Lee wrote:
On Wed, 17 Dec 2008 22:00:51 +0000, asdf
wrote:

On Tue, 2 Dec 2008 13:03:35 -0800 (PST), D7666 wrote:

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.

IIRC, the NR platforms at Harrow-on-the-Hill only have mirrors. The
north/westbound NR platform is occasionally used by Amersham-bound LU
trains.

Do they stop there these days? When I lived in Harrow it was the
through line for trains that didn't stop.

There was the famous occasion when the signalman thought the Master
Cutler was a Uxbridge fast and routed it down the line to West Harrow.
I never did find out how they got it back on the main line.

Don't all LU trains stop at Harrow on the Hill? Last time I got an
Amersham-bound LU train I was slightly surprised that it used platform
1 at HoTH, which I expected to be used mainly by Chiltern when they
stopped. However, it had stopped at Wembley Park in platform 1 as
well, where I got on (still requiring a crossover to get to platform 1
at HoTH).

I put both down to changed patterns in the many years since I had been
that way before. Firstly, you now get fast plus Wembley Park (where
stopping at Wembley Park used to be only done by the extra stopping
Amershams that ran on Sundays) and secondly, all Metropolitans seemed
to cross after HoTH rather than before. It does make sense to group
Chiltern and LU fast Amershams in the same platform though.