The B2231 is a rural B-road mostly on the Isle of Sheppey.
The route starts at a roundabout on a GSJ with the A249 near Swale Station. It crosses the Kingsferry Bridge onto Sheppey and continues north along the old A249 as far as Cowstead Farm where it meets the A2500.
Until recently the A2500 was numbered B2231 but there is now a multiplex for a few miles east along virtually the whole length of the A2500 (with only the short link back to the A249 missed out). That road ends at a roundabout on the western end of the Eastchurch bypass.
The B2231 regains its number by running eastwards along the bypass and then continues on to Leysdown-on-Sea. It goes through the village and terminates at the point where it meets the sea wall, the road contining unclassified along the coast to the end of the island.
An amended OpenStreetMap trace for this route awaits uploading to the SABRE Wiki.