Nexus Protect UK price?

I can't find this information anywhere. How much was the Nexus Protect warranty in the UK for those that got it. How long does it cover the phone for?

Unlock Bootloader voids Nexus Protect (Google Warranty)?

Will unlocking the bootloader void the Nexus Protect warranty provided by Google? Ive read that once unlocking the bootloader there is a fuse that breaks to prove that the device has been unlocked. Is this true? If so does anyone know if doing so will void the protect program? Kinda silly if its true since Nexus are great Developer phones.