TfL are believed to have proposed two options to make this possible - an option for 2tph terminating at London Bridge itself, or 2tph that stop there then run through to Charing Cross.

While on paper this may be attractive, TfL themselves have previously admitted that there is no scope for additional services to London Bridge whilst the Thameslink Project is ongoing. Pursuing this option, therefore, would likely require either main South London Services or the London Bridge - Sydenham service to lose services in order to provide paths.