In late October I was provided with a new list of OSIs which had come from the ATOC fare manual rather than my usual source at TfL. It looked like there were some useful new OSIs, including the long awaited Bank to Cannon Street interchange. Later I received my usual update from TfL which showed that the ATOC list was rather inaccurate with most of it’s changes. I even went out to test the Cannon Street to Bank route and proved that sadly there is no OSI between Cannon Street and Bank. A few days ago I received a reply back from TfL which confirmed that they are seeking feedback from the TOCs as to whether they want this OSI in the future.
The original version of this post (02/11/2010) follows:
I have acquired a new updated list of OSIs and updated the table on this site. Full details of the changes are included in comments below that page, but of interest to many will be the long overdue inclusion of Bank to Cannon Street as a valid OSI.