Potentially hundreds of Thameslink passengers may have been overcharged over the two bank holiday weekends in May. On both weekends the line between West Hampstead Thameslink and St Pancras (low level) was closed for engineering work. Trains from Bedford/Luton terminated in platforms 1-4 at St Pancras (high level) and passengers wanting to continue south had to walk down to the low level platforms (A-B). The problem is that there was no internal out-of-station interchange (OSI) set up between the Oyster validators for platforms 1-4 and the gateline for platforms A-B. Thus a journey from Elstree to Blackfriars was charged as two journeys; Elstree to St Pancras and St Pancras to Blackfriars.
This may seem like a strange question, but if you read this recent article on the MyLondon website you may be confused. The article explains how several pairs of stations are linked so that journeys are charged as one. In it the author asserts: You must not touch anything else with your Oystercard or contactless … Read more