"Colin Rosenstiel" wrote in message
l.co.uk...

I thought there might be something like that. I'm also guessing
that it would be illegal to have tracks not equipped with some sort
of redundant saftey system in potential revenue service.

I thought TPWS was installed on a risk-of-SPADs basis, so not on all
stretches of all passengers lines?

I don't know, but my guess is that it would have to be one or the other in
order to safely and legally operate NR trains in revenue service.