Thank you both so far.
I have sent the fork back for a refund, arguing that they are faulty.
The retailer claims to have had the fork inspected by 3 different warranty advisors, all of whom have confirmed that there is no damage.
This obviously effects who pays for return postage. After asking for a refund on the return postage costs, I have been offered a ‘goodwill gesture’ of vouchers. I have an issue with the principle that they think this fork is ok and secondly, that they are offering a gesture of goodwill, rather than fulfilling a basic requirement.