Clive Coleman wrote in message:

I don't troll this N/G but I do remember working on British Railways
when propelling was not allowed above 40mph. I expect I'll now get
some egghead to troll me, but this was always the case when working
tender first. (It also had the advantage of keeping the coal dust out
of your eyes).

Generally 45mph now for tender engines working backwards (at least, in all
the tender engines I've been in).

However, do note that this was not due to the dange of derailment. It was
due to poor visibilty.

Do remember that push-pull services with tank engines existed for a long
time during the big-four period and continued into BR days. These were not
troubled with visibility problems, as the driver could control the engine
from a suitable front coach - something which could be called the very first
DVT, but better known as the auto-coach

Ronnie
--
Volunteer guard on the Great Central Railway, Loughborough, Leicestershire
Visit the world's only double track preserved steam railway!
http://www.gcrailway.co.uk