The R8 runs between Orpington Station and Biggin Hill via Green Street Green and Downe with the route mostly traversing very narrow rural roads. With an end to end journey time of just over 30 minutes and a scheduled bus every 70-90 minutes the whole route can be served by a single bus. There are 12 services each way a day and no service on Sundays or Public Holidays. The R8 is one of 13 TfL routes with an R prefix, with these numbered R1-R11, R68, and R70. The R1-R11 all operate in and around Orpington with the R68 and R70 operating around Richmond. Intriguingly all 11 R prefixed buses in Orpington stop at High Street / Orpington War Memorial in central Orpington.

London has over 19,000 bus stops, several hail and ride sections , and (to my knowledge) two bus stops that are not a bus stop. Bus stops that are not a bus stop are common outside of TfL's remit with them usually seen as a way to save money and only erect one bus stop not two. Interestingly, whilst served by a TfL operated bus route both of these stops are actually located in the county of Surrey (outside of Greater London) with one in the borough of Epsom and Ewell, and the other in Reigate and Banstead.