From TFL’s weekly weekend travel email:
This leaves us with only 2 trains an hour on both Saturday and Sunday:
Forest Hill to London Bridge at 43 and 13 past each hour from 0643 to 2313
London Bridge to Forest Hill at 10 and 40 past each hour from 0610 to 2340 then 0020 & 0035
Forest Hill to London Bridge at 0749* then at 18 and 48 past each hour until 1218 then at 46, and 16 past each hour from 1246 until 2346
London Bridge to Forest Hill at 0731, 0801 then at 24 and 54 past each hour from 0824 to 2254 then 2331 and 2350
Southbound services from Forest Hill on Saturday terminate at Coulsdon Town but on Sunday terminate at Caterham/Tattenham Corner.
According to the ‘planned line closure’ information on the TFL website these weekend shutdowns on London Overground services are due to continue until the weekend of 15/16 August with a further closure on Sunday 23rd August. However the ‘engineering works’ information for London Overground on the National Rail Enquiries website does not match what is shown on TFL for every weekend!