You can try and warrant it but given that you fit the bottom bracket yourself, the likelihood of a positive outcome is slim.
Getting anything warrantied in the UK that isn't a busted Lefty is pretty tricky, non?
Depend on the shop, even if it's not possible, they may offer something at discount.
@Howard started
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You can try and warrant it but given that you fit the bottom bracket yourself, the likelihood of a positive outcome is slim.