The Bourne and Sleaford Railway was an 18 mi Great Northern Railway built single-track branch railway line that ran between Bourne, on the Midland and Great Northern Joint Railway main line between the Midlands and the Norfolk Coast, to Sleaford, on the Peterborough to Lincoln Line via four intermediate stations: , , , and .

Based on that paragraph can we conclude that this sentence is true?
The Bourne and Sleaford Railway was an 8 mi Great Northern Railway.
No