On the rear axle of my Kentex there are 8 bearings in total although 2 are redundant serving only to locate the axle on the drive side,
also when 'freewheeling' the entire axle and secondary chain continue to rotate with the freewheel unit being located in the rear gear cluster or in your case the SA hub so there is a heck of a lot of 'stuff' causing drag. The wheel on the 'non-drive' side is held on on mine by a Nylock' nut which must be left slightly loose or it pinches the bearings in the hub and prevents the wheel fromm spinning freely.
View attachment 651814
On the driven side the wheel locates on 3 prongs to the corresponding holes in the hub flange that lock it to the axle (that makes the bearings in that wheel redundant)
There will be something similar on your Pashley but it may be a keyway on the axle shaft nevertheless the driven wheel will be locked to the axle somehow