You are entitled to travel to these underground stations on your Gold Card if you change at London Bridge. This continues to be the case until August 2016. You shouldn't need a special ticket as the ticket barriers know that tickets to London termini should allow this connection (unlike your ticket from last year which would have needed replacing to allow this).

Details are on the Southern website: http://www.southernrailway.com/your-jour...r-journey/ and there is no doubt that they should be honouring this commitment to tickets working on the underground.

I've had a lot of discussions with Southern and TfL about the available routes, so if the ticket really doesn't work in the ticket barriers, let me know and I'll chase up with the Stakeholder Relations Manager. You can email me at michael@fhsoc.com