Buses are also seriously affected (TfL don't have this info):

176 and 197 are not serving London Road or Dartmouth Road instead running fast from Kirkdale to Lordship Lane avoiding FH.

356 is not serving London Road, Sydenham Rise or Kirkdale between Sydenham Hill and The Woodman. This bus is on diversion along Dartmouth Road from The Woodman to FH Station.

185 is not serving London Road and is diverted from FH station via Dartmouth Road, Kirkdale and Sydenham Hill to Lordship Lane.

P4 is also diverted via Sydenham Hill, Kirkdale and Dartmouth Road, however I can't confirm it it's running along Devonshire Road to HOP or running as the 122 via Stanstead Road to Brockley Rise.

122 is running a normal service.