The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom and its predecessor states.
N scale is a popular model railway scale.
A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than the standard.
O scale (or O gauge) is a scale commonly used for toy trains and rail transport modelling.
O14 is a set of model railway standards for accurately modelling narrow-gauge railways in 1:43.5 (7 mm scale) using gauge track.
On30 (also called On2, O16.5 and Oe) '''gauge''' is the modelling of narrow gauge railways in O scale on HO gauge track in 1:48 scale ratio by American model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental European model railroaders (excluding France).
OO gauge or OO scale (also spelled 00 gauge and 00 scale) model railways are the most popular standard-gauge model railway tracks in the United Kingdom.
Railway modelling (UK, Australia and Ireland) or model railroading (US and Canada) is a hobby in which rail transport systems are modelled at a reduced scale.
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed with some organisations, including the and preferring to use Britain as shorthand for Great Britain is a sovereign country in western Europe.