Please see the Go-Coach website.
As of 30 October, bus 3 is being reinstated just 3 times a day on Mondays to Fridays – Sevenoaks to Knockholt, Green Street Green and Orpiington, and now extended to Farnborough Hospital.
Incidentally, by changing at Green Street Green in the morning for TfL bus 358, it would be possible to have a quick trip to Bromley, although one would need to catch an early enough 358 back from Bromley so as to connect at Green Street Green with the last no. 3 back to Sevenoaks.