A green sign with a diagram showing a roundabout with exits ahead, left and right, and the following text.
Forward destinations: London; Stevenage A1 .
Left turn destinations: Biggleswade; A6001.
Right turn destinations: Shefford; B658.
The town of Biggleswade has a bypass that travels around the town in two big sweeping curves - one left then one right. At each end there's a roundabout, and this is the first.