got a reply from southern- seems like they pay some attention to passenger feedback... Thank you for your enquiry regarding the 0651 departure from East Dulwich to London Bridge on weekdays. This service came in with the new timetable introduced on 17 May 2009, so its first day of operation would have been Monday 18 May 2009. It is the 0630 Selhurst to London Bridge service, intended to alleviate overcrowding on trains on this route in morning peak time. I hope you find it useful, and will of course be glad to hear of any comments or suggestions you may have to make regarding this or any other aspect of Southern services. Regards