What ever happens, you can claim it back - see page 39
http://dlrlondon.com/pdf/DLR-Conditions-of-Carriage.pdf
You have:
• bought a ticket
• (if paying as you go):
touched your Oyster
card on the card
reader
but are unable to start
your journey because
of service disruption.
give you a full and immediate
cash refund of the fare you have
paid if you hold a single or
return ticket.
if paying as you go, credit your
Oyster card with the amount
paid – this will generally be
paid the following day.
Send in your ticket straight
away by Freepost to the
DLR Customer Services
Centre, Freepost EDO
5793, London E14 0BR.