In article ,
Tim Roll-Pickering wrote:
MIG wrote:

Touching at the platform readers is only necessary when changing to or
from National Rail from or to either Central or DLR (and then only NR
east of Stratford?).

I was told one had to always specifically touch in and out for the DLR,
hence the tunnel readers at Bank.

I've not used those when transfering tube-DLR and not had an
unresolved journey on touching out of the DLR, so it seems to be OK.