 On 1 April 1871 the section between Quainton Road and Wotton was formally opened by the Duke in a brief ceremony . At the time of its opening the line was unnamed , although it was referred to as " The Quainton Tramway " in internal correspondence . The extension from Wotton to Wood Siding was complete by 17 June 1871 ; the opening date of the northern branch to Kingswood is not recorded , but it was not yet fully open in February 1873 . The London and North Western Railway immediately began to operate a dedicated service from Quainton Road , with three vans per week of milk collected from the Wotton estate shipped to Broad Street . Passengers were not carried , other than estate employees and people accompanying livestock . 
