"Mr Thant" wrote in message
...

The District Dave thread on the topic is pretty comprehensive:
http://districtdave.proboards39.com/...d =1186751545

It gives the impression they're automatic and purely informative, and
only installed in places where the driver can't see the other train.

Interesting thread, I didn't know that there were holding lights at Wembley
Park as well.

I'm surprised that there are no holding lights on the Victoria Line,
considering that it was designed specifically to allow easy cross platform
transfers. But I guess the tightness of schedules and the intervals don't
allow for that.