Unless the examiner has had a fight with his/her wife/husband and happens to get your paper, I doubt they'd get a fit on seeing that there isn't any info in the sealed section.
Moreover, as long as you've put your candidate number on the main section of the first page, it's fine. They should be able to link it to your contact ID in the unfortunate event that your supplementary book gets detached from your answer book (which is, again, highly unlikely to happen).
