This evening I attempted to use my Staff Oyster Card to enter London Bridge National Rail Station in order to access Platform 5 to get a Thameslink service northbound through the core. My card didn’t work so I approached a member of Southeastern staff who was manning the gateline. She told me that the rules have recently changed and my pass is no longer valid through the core. She said it is now only valid between Kentish Town and St Pancras. I was surprised as I hadn’t heard this, but rather than argue I headed back downstairs and got the Northern line. Having just checked the staff travel intranet site I can see that it still says that passes are valid between Kentish Town and Elephant & Castle / London Bridge — as has always been the case. Can anyone shed any light on this? Also why didn’t my Staff Oyster Card work the gateline — I’m sure it used to.