Start on A15 at 2nd road gulley south of metal farm gate opposite Willoughby road 1.2miles south of Quarrington roundabout on A15 Sleaford bypass. Proceed south along A15 through Osbournby to roundabout A15/A52. Take 1st exit, direction Spalding and Boston over railway bridge at Donnington to turn at A52/A152 roundabout at foot of railway bridge. Retrace along A52 to Osbournby roundabout taking 3rd exit onto A15 direction Sleaford. Pass through Osbournby to finish at end of kerb 15 yards south of lamp post no 4, short of right turn to Silk Willoughby on A15, 652 yards south of the start.