Ffarquhar Branch Line

Thomas' Branch Line is Thomas' own line. He loves it dearly and considers it the most important part of the entire railway. He earned it after helping James, who had a nasty accident. The section between Knapford and Elsbridge was the original route of the Tidmouth, Knapford and Elsbridge Railway.

Overview
Thomas' branch line starts from Knapford Junction where it connects with the Main Line. It then calls at Dryaw, Toryreck, Elsbridge, and Hackenbeck before terminating at Ffarquhar.

Thomas and Daisy run passenger duties with Annie and Clarabel. Toby, with Henrietta, Victoria, and Elsie, run trains to Anopha Quarry. Percy is in charge of goods duties, although when Thomas is absent he takes over passenger duties. He and Toby also appear to share the workload of stone trains to Knapford Harbour. Stepney, Duck, Wilbert, and Emily have also worked on the branch at various points. Edward once made a trip to the quarry before the policeman stopped Thomas for being "unsafe".

The branch also has a goods-line from Toryreck to Knapford Harbour, worked by Percy. This line also has a connection to the Dryaw mines, formerly used for mining lead but now being worked for deposits of uranium.

The quarry tramroad extends five miles from Ffarquhar, through the streets of the village, then into the hills to the private sidings of Anopha Quarry. This tramway is property of the North Western Railway and was formerly worked by Toby, but more recent arrangements have allowed for Mavis to operate trains on it.

In the television series, it continues to Bluff's Cove Junction, Seaside Halt, Bluff's Cove, and Maithwaite.

Operations
The branch carries passengers, quarry stone, farm produce, dairy products from St. Pedroc's Dairy in Elsbridge, general goods, and uranium from the mines. Some passenger trains work into Tidmouth to pick up a through coach from the Wild Nor' Wester.