typically, had this back from the dealers
"....due to the alloys being kerbed they wont look to support the claim under the warranty."
clearly, I'm not going to accept that as the kerbing in no way influences the bubbling - the kerbing being on the outer rims and the bubbling occurs on the rays
So, got the claim reference from the dealer - contacted Nissan direct and hey presto, Nissan can't find anything related to that number
they've created a new case reference and will contact me in the next 24hours
telephoned the dealer back and she just sighed and added my reference number to hers on her system
any suggestions from those who have gone through a warranty claim on wheels before ?