Which sport is the subject of the 2006 film 'The Flying Scotsman'?

'The Flying Scotsman' is a 2006 British drama film, based on the life and career of Scottish amateur cyclist Graeme Obree. The film covers the period of Obree's life that saw him take, lose, and then retake the world one-hour distance record. The film stars Jonny Lee Miller as Obree, Laura Fraser, Billy Boyd and Brian Cox.

The film starts with Graeme Obree (Miller), who suffers from crippling bipolar disorder, cycling into a wood where he prepares to hang himself. A flashback to Obree's (Sean Brown) childhood depicts him being physically attacked at school by other pupils, leaving severe psychological scars. One day Obree is given a bicycle by his parents and we see Obree evading the bullies on his bike.

Obree decides to try and beat the hour record. He has neither the funding nor the quality of bicycle required. Determined to succeed, he constructs "Old Faithful", a revolutionary bicycle designed by Obree for maximum efficiency, made up from scrap metal and components from a washing machine. Obree planned to break the world record in Norway but failed at his first attempt. The following morning his attempt was successful. His victory is short-lived, and his record is broken by Chris Boardman (Adrian Grove (credited as Adrian Smith)) a week later.