Gerry Fiennes (full name: Gerard Francis Gisborne Twisleton-Wykeham-Fiennes OBE, MA) (7 June 1906 – 25 May 1985) was a British railway manager who rose through the ranks of the London and North Eastern Railway and later British Rail following graduation from Oxford University. British Rail fired him in 1967 for publishing an outspoken and critical book, I Tried to Run a Railway.