UPDATE
i have received this email from Trek today...
Darren,
After talking to my colleague and the store in question, it appears the wheel did not come back here. Let me apologise that I have mis-led you in anyway.
I believe my colleague asked the store mechanic for his opinion on the failure and the mechanic was unsure whether the failed axle occurred from a manufacturers defect. This is not rare- after all the warranty supplied with the Trek bike is offered by the place of purchase, so we value their judgement in claim scenarios. The outcome was that they decided that the expense of getting a wheel back and then re-delivered to Rotherham would not be worthwhile and a credit was placed on the shops account to cover the part (but no labour). This in effect approved the warranty claim lodges with JE James.
funny thing was, when i asked them at James' , they said the claim trek would NOT honour the claim...
I wonder why???