The postcode will take anyone using a satnav to the shops on nearby Kellaway Avenue. When the site was built in the 1920s in the middle of the common, Kellaway Avenue was just a track and none of Henleaze, Golden Hill, Horfield or Manor Farm had been built then. 

These are directions that work for us: once on Kellaway Avenue, the turning for The Ardagh car park can be found between Lime Trees Road and Dyrham Close on the opposite side of the road. Turn onto the tree-lined single track lane which will bring you straight to the car park.  

Or try these:

https://what3words.com/orbit.edges.ripe

https://moovitapp.com/index/en-gb/public_transportation-The_Ardagh_Horfield_Common-South_West-site_194652680-2106