Mr Thant wrote:

Currently the only way out of the DLR platforms is by two parallel up
escalators, which from previous indications are near-enough life-
expired. If one of them has broken down (which it sounds like), then
that limits the number of passengers that the station can safely
handle, and therefore the number of trains (since the trains are
normally full).

Yes but I suspect the impact of this is going to be people trying to cram on
at Shadwell (or earlier stations), with all the potential problems arising
from such a situation. It's not really encouraing an alternative route that
people will take - the Jubilee Line doesn't serve the City.