It's a marginal case.  Compared to how it was, it was made dual and feels like it.  The river bridge has old and new halves with a physical division, and the W arm of the T junction has a more-than-minimal island and about a 13m spacing between E and W bound.  So this section is divided.  Beyond that, it's a question of where these 2 ways meet - functionally it's good as it is and OS OpenMap Local agrees.  For OSM, the join points back to a single way could be shorter if people want.