Biometric screening is only one element of the overall screening apparatus that is being used as part of this process. It is only one of the multiple layers of security.
You're absolutely right that sometimes information on some of the biometrics against which we're screening may not be found, but that's why we have the additional support of the interview and a series of other security layers that are being used as part of the process to ensure that we know as much information as possible about the individuals who are coming in.
As Mr Oldham mentioned, and as our minister has mentioned, anybody we're not certain about at this point in time and anybody we require additional information or review on is set aside.