start on b1043 approximately 600 yards south of stilton flyover at the southern edge of farm entrance. proceed south on b1043 over sawtry north, sawtry (st andrews) and stanch hill roundabouts, to turn at sawtry toll bridge roundabout. retrace outward leg to finish opposite gated entrance approximately 150 yards short of the start point. on the return leg take extra care at sawtry north roundabout. you will approach it downhill and need to make a sharp right hand turn to remain on the b1043.