Ahh............at last a response from Al-Ko to the dealers.
I have to return the jockey wheel to the dealers who will forward it to Al-Ko for them to assess it and decide if they will replace it under warranty.
Evidently Al-Ko don't deal directly with the general public,you can say that again.
I think when/if it gets replaced I will change the whole jockey wheel assembly for one with a pneumatic tyre then it may roll over the rough ground of our storage more easily and hopefully avoid further damage.
Pity the present contraption doesn't take a pneumatic tyre,or it was possible to only buy the lower half of the jockey wheel, but then Al-Ko wouldn't be able to sell you a complete assembly would they ?