Hi Dezza, thank you very much for getting in touch. 
 
Since there isn't a designated entry/exit for the parking area, and the lack of a designated parking aisle with on-the-ground markings, I would say that it wasn't an ideal representation on OSM. 
 
Based on the OSM Community Guidelines (https://wiki.openstreetmap.org/wiki/Street_parking#Parking_position), the location would be best represented as a street-side parking tag on both the highway section and the parking area. The first example on the Street-Side Parking article (https://wiki.openstreetmap.org/wiki/Tag:parking%3Dstreet_side) also supports this suggestion. 
 
I can go forward with the necessary adjustments if you also agree with this.