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- Fag packet livery: the original livery of the First Great Western HSTs – a basically green colour scheme, fading to ivory, with shiny gold stripe, below the windows, so called because it resembles the packaging of a brand of cigarettes ('fags').
- Ferret and Dartboard: The second British Railways emblem introduced in 1956, featuring a lion rampant holding a wheel. From a distance the wheel has a passing resemblance to a dartboard.
- Flying Banana: the first design of GWR diesel railcars, introduced in 1932. This has since been adopted for the Network Rail New Measurement Train, due to its all-over yellow livery.
Read more about this topic: Glossary Of United Kingdom Railway Terms