Cracked taillight on 981S replaced under warranty?

[FarzyB]

Hi everyone - the left taillight on my 981S has developed a small crack at the top of the lens which is starting to let in moisture that is condensing inside the lens. Has anyone had to replace these before? Are they covered under the warranty? It doesn't look like an MOT issue as the brake lights are still clear, but it's obviously cosmetically unappealing!

Thanks!