The line was of little significance until the late 19th century, when the London & North Western Railway (L&NWR), which had absorbed the L&BR, constructed a line via Nassington and King's Cliffe to Seaton, below Welland Viaduct. This turned Wansford, previously an unimportant village station, into a major junction. Its importance increased a few years later when the Great Northern Railway constructed another line via Sutton, Southorpe and Barnack to Stamford, on the Midland Railway line. In 1884 the line received a royal visit when the royal family travelled from Peterborough to Barnwell, some beyond Wansford, to visit Barnwell Manor, home of the then Duke of Gloucester. The station building is now preserved at Wansford station on the NVR, and is known as the Barnwell building.