I mentioned it in the thread back in September that Southern will be adding four trains per hour in the morning peak and two extra trains in the 5pm hour from December 16th.

To London Bridge, trains will be every 15 minutes from 0727 until 0927 with services operating at x13, x27, x43 and x57 past each hour.

After 0927, trains operate every 30 minutes to London Bridge at x27 and x57 past each hour.

From London Bridge, trains will depart at 1658 to Victoria, 1710 to Sutton, 1728 to Victoria, 1740 to Sutton and 1758 to Victoria. After 6pm it reverts to x28 and x58.