Yes: it's in the 5-year background check that the problem arises. Airport security asks a letter from your former employers, and you as an applicant are not involved in the process. No answer = a gap = no pass. Easy.
It doesn't matter if the company says something bad about you, they just need to say you exist and you worked for them for that period of time.
Company has accepted to deliver that security reference in exchange for bond money (19200 £) !!!!!!!
So, anybody has an idea how to tackle this? Had a similar experience before?