John Rowland wrote:
"Arthur Figgis" ] wrote in message
...

Is it because of the TPWS (a safety system, look for
some metal grills between the rails), which would stop
them if they came in any faster than a crawl? A while
ago there were some posters at either Victoria or
Waterloo explaining it. I've heard announcements
pleading with people not to try to open the slam doors,
as the train would continue to crawl rather than stop
as might be expected.

So has this particular implementation of TPWS made the railway less
safe?

It depends on your perspective. There is a school of thought that suggests
such is the case when passengers alighting through slam doors while the
train is still moving can get to the stopping mark before the train.