Sleaford North signal box when it was open. This signal box is to the north of Sleaford at the junction of  the line to Sleaford West and the Sleaford avoiding line . This signal box closed in 2014. The level crossing gates here are now lifting barriers instead of level crossing gates.

The Sleaford avoiding line is part of the Great Northern and Great Eastern joint line and had been out of use for about the last 20 years. In 2012 Network Rail started work on relaying the avoiding line. Part of the work was replacing the signals and Sleaford North signal box and Sleaford south signal box. It is now back in use.

This signal box was on the railway line from Peterborough to Spalding  Sleaford and Lincoln and Doncaster on the Great Nothern loop as it is called today. Much work has gone into upgrading this railway line. This has meant that nearly all the old signal boxes and signals and hand worked crossing gates have all gone. These have been replaced by a new signal center at Lincoln, which is to be replaced, when the York signal Center goes on line.