Having read through all the previous posts on this subject it is clear that, although the WNG parts books and maintenance manual show the double ended G1/55 & G1/55A sheet metal 'wheel bearing adjustment' spanners their 1 inch (1.010") jaw size (and their thickness) are too big to fit the WNG front wheel bearing adjusting nuts which are 7/16 whitworth / 0.817". 'Normal' spanners are just too thick to allow the bearing adjusting nut to be held whilst the locknut is tightened.
As with the rear wheel taper roller bearings there should be a bit of play, so holding the inner bearing adjuster nut whilst tightening the outer locknut is quite important for bearing life. (These bearings are quite expensive !)
I've made a couple of spanners from sheet steel which do the job but was wondering if anyone has come across an actual Ariel spanner produced for this purpose.