"The North British Railway was a British railway company, based in Edinburgh. Established in 1844, its network grew from the original Edinburgh\u2013Berwick-upon-Tweed line (completed in 1846) to serve the East of Scotland. It provided the northernmost part of the East Coast Main Line, and at the Grouping in 1923 the NBR \u2013 then the largest railway company in Scotland, and the fifth largest in the United Kingdom \u2013 became part of the London and North Eastern Railway."@en . . .