[ubuntu] Help to correct unrecognised UUID when using grub2

I have tried to installed 16.04. But after rebooting grub reports seeing UUID dc5fba3b-a040-44a9-9af7-ceb52441b151 but I have checked the blkid and fstab but there is no mention of the UUID so I ran boot-repair but it does not fix it because of a 'Close all package managers ruing error' I don't think I'm ruing any ...

But boot-repair did show up the UUID in a boot sector on /dev/sdc but I'm booting off /dev/sdb so I'm puzzled.

I also tried manually updating grub but get either the /cow message or /dev not available arrrggh.

Heres the boot params link http://paste2.org/GNOeY3V7 thanks in advance.

Toby