This single segment is down to L1 for you. I do know, however, that on Oxfordshire’s recent history of village 20mph changes, it’s likely more of the village will be 20mph, so can you please reply with another permalink including the rest of the segments if possible, and if needed.
You can select multiple segments in a single permalink by holding down Ctrl (or Cmd) and clicking on them all, before generating the permalink.
In fact, as per the consultation plans, available here, I’ve downlocked all these segments to L1 - feel free to change them all to 20mph so you get the edits