Had a view of the District Line track replacement works between Barking and
Upminster yeaterday, from a passing c2c service. I was wondering what short
of length they can do in a weekend, and if the renewed track is basically
done to the same standards as NR use, eg sleeper spacing, ballast depth etc.
I noticed the same orange tubing guarding cables in the four foot for
instance.

If suitable locos were available, could the 'slinger train' work in the SSL
tunnels at all?

Paul S