"Pat Ricroft" wrote in message
oups.com...
Bob Wood wrote:

LT are reporting "Code Amber". All trains being stopped at platforms
and
evacuated to ground level.

Just out of interest, how exactly does this work? I can't help feeling
that there are usually more trains on the system than there are
stations, and that therefore some trains get stopped between stations.
Do they detrain people in the tunnel and get them to walk along to a
station? Or do they hold trains in the tunnel until the train ahead has
been emptied and shunted forward?

If there is a case of more than one train between stations, the first pulls
in, unloads and then pulls forward, either by one car, or fully out of the
platform, enabling the second one to trip past the signals and into the
platform.