On Thu, 04 May 2006 18:41:44 GMT, David Howdon
wrote:

Delays on the district line today were being blamed on "hot weather
precautions" by the station announcements.

What precautions are these? I've never heard of them as a cause of
delay before.

Speed restrictions have had to be imposed because the rails have not
been pre-stressed to allow them to expand safely as temperatures rise.
--
Paul C


Admits to working for London Underground!