Thanks mate, 1 tyre only on the inside of the tyre and I'd say smooth but it was down to the wire. Rest of the tyre was fine. Opposite tyre was fine but a tiny bit of wear but it's been on longer. No axle flipping and tyre pressures were the same. Might take it to a truck place to get an alignment.
Cheers
Just the one wheel certainly sounds like bearing, worn hangar bolt, sad spring or stub axle bent. but could be dodgy tyre if its some chinky no name ...
Check the bearings first, just jack it up, under the fish plate not from the chassis and give the wheel a shake, rotate 90 deg and shake again should be no clunk or movement .......
With both wheels on the ground measure from top of axle or fish plate to chassis, same spot on both sides, it should be very close to the same measurement, too much and a spring is getting sad...........
Also check the spring bushes and bolts if one is flogged out or worn bolt it will cause the same sort of wear, to check van on hard level surface with jack stand under draw bar, support chassis with jack stand so load off axle, and pull off each bolt to check wear you can also see if bush in spring is round or not, a bottle jack under axle is needed as well and of course wheel is removed..........
or a truck align shop does make things easier.
Never lift van wheels unless draw bar is supported by a jack stand, never with the jockey wheel and never get under if just supported by a jack, always use a jack stand under the chassis.
I had one of the 4 on Big Mal start to wear on inside one trip and by time I got home it had increased, a run around with the tape measure pointed to a spring sagging so replaced all four springs, 80K km roughly done which is about the life of the springs on my rig, totally different set up to yours but the theory is the same, new bearings would have been cheaper though.