I have used my DL to identify myself to fly in the UK for 12 times in the last 6 weeks.. Next week I will have to work airside without a proper airside pass at two different places possibly. That is still in the process of application. Passport will not be enough either. Our old warhorse has it easy, get a passport because he is too old for a driving licence.. It will happen if he asks, why use the rubbish press??