There seems to be some confusion here: The cariage of the National ID card will not be mandatory and you would not have to produce it going through security or indead anywhere else. It will however have to be produced when applying for a renewal or initial issue of an airport pass. As stated earlier you will not be able to get a disclosure check done without having a Nat ID.
The only added benifit would be confirmation of who you are when applying for an airport pass. However as has been already proved forgery of the proposed card is relitavely straight forward so criminal elements who want to can become 'good guys'.
Remember also that it is not just pilots but all airport staff who will be effected.
The main point of the exercise is to introduce the id card by the back door.
Most people are not against identification and proof of identity per se it is the incredibly intrusive and private information that will be colated and stored centraly by our trustworthy government that is the problem.
It will not enhance security and is potentialy a backward step.