Hi,
Confirmed by ground survey:
* The southern section is vehicle one-way, but a two-way cycleway
* The Northern section is two-way (otherwise access would be impossible)

The existing tagging of highway=service
oneway:bicycle=no
oneway=yes
looks good to me.
The name=Great North Road is on a sign, so added.
survey:date=2024-03-27

Happy Mapping,

James