The B1437 is an L-shaped road through the Suffolk village of Kessingland. The north-south section of the road was the original line of the A12 whilst the east-west section was originally unclassified, gaining its number in the mid-1930s.
The road starts at a roundabout on the A12 at the northern end of the Kessingland bypass and heads south along that road's old route into town. Here a spur of the B1437 (but the original 1930s western end) turns off left along the narrow Church Road to rejoin us in the next paragraph. Meanwhile the road continues ahead into the suburbs to reach a T-junction. The A12 is met at a roundabout just to the right.
The continued route of the B1437 turns left to head east along White's Lane, passing the entrance to Africa Alive! (formerly the Suffolk Wildlife Park). Church Road soon comes in from the left and then this road takes on that street name and pass the church. We continue on, with houses on the left and fields on the right. Presently the road narrows as it enters the area of Kessingland Beach and continues to end quite unexpectedly on the sea wall. An unclassified road continues south from here to a holiday park.