Received a response from Tfl – not encouraging I’m afraid:
Thank you for your email of 24 October about your 60+ London Oyster photocard issue on 23 October.
I am sorry for the error code showed when you tried to re enter the station at Wombledon
.
Transport for London (TfL) has an in-built system that prevents fraudulent use of payment cards. The 41 code indicates that your travel pattern was flagged as suspicious, even if it was a genuine mistake. For example, it might occur if you:
• Tap in, change your mind about travelling, tap out, but then decide to go through the gates again.
• Tap in, discover you’re on the wrong platform, tap out, and then tap in on the correct side.
• Experience an error or faulty gate, causing you to tap multiple times
I have taken your feedback on board but at this moment on time, we are unable to amend the system settings, I do apologise.
“Wombledon” was quite an amusing typo though!