START   At the forward most rain water drain in layby on B1043 just south of the B660 junction and Woolpack Farm.

Proceed  Southwards on B1043 to Sawtry North Roundabout (1.4 miles) where

Straight on     1st  exit to St Andrews Way Roundabout (1.8 miles) where

Straight on     1st  exit to Sawtry Interchange Roundabout (2.2 miles) where

Straight on     1st  exit to Tollbar Way Roundabout (3.0 miles) where

TURN     4th  exit to retrace North, straight on over the 3 previous roundabouts, past the start on the other side of the road, to Stilton Roundabout ( 8.5 miles) where

TURN             to return south on the B1043 past the start (11.0 miles) to commence a 2nd lap

Lap 2

Continue south until the southern turn at Tollbar Way Roundabout (14.0 miles) retrace north to the Stilton roundabout turn (19.5 miles) then retrace south (past the start a second time) to Tollbar Way Roundabout (24.9 miles)
TURN LEFT 1st exit onto B1090 and

FINISH          opposite the dropped kerb. (25.0 miles).