I’ve been informed by a site visitor that changes are on the way for people who travel between the Morden end of the Northern line and stations east of Clapham High Street on the Overground extension. He enlisted the help of his London Assembly member and received the following response:
Some customers travelling south to/from the East via the southern end of the Northern line are wrongly being charged as if they had travelled via Zone 1. Please pass our apologies to ******** for this anomaly.
We are working to rectify this issue as quickly as possible and it will be resolved by mid January. In the meantime, an automatic refund process is being put in place for customers who we have been overcharged, which means that they do not need to contact us in relation to this issue. Refunds for customers affected will be available to collect on the following day when they touch in or out at the station they use most often and they will be backdated.
This is a good result and both I and the visitor will be keeping an eye on how this works out. I will also be trying to find out whether any of the other anomalies (like Wimbledon to Whitechapel) also get fixed.