That's really nice to see that only a basic DBS is required. With the strict security protocols at airports, I would have expected a standard or enhanced one.
I'm used to seeing standard/enhanced checks required for jobs that don't seem to warrant it, and I have no idea how they get around the ROA. After all, for some fairly routine jobs in a back office at a bank etc., you need standard/enhanced checks, even though there is no public safety issue. Good luck with the application!