@Stevie - Re: @Graham Marsden
Driving a car is a privilege, not a right and you accept that as part of that privilege you are required to 1) Pass a Test to demonstrate you have, at least, achieved the minimum level of skill to be allowed out on the road, 2) Make sure your vehicle has an MOT (and thus is safe to be on the road) and 3) Insure the vehicle to protect others if you behave irresponsibly and damage them, their vehicles or their property. None of these are requirements to be allowed to walk down the street.
Your references to gasment, electric meter readers and students/ lecturers are irrelevant to the situation under discussion.
If you have no problem with me (or anyone else) having to prove who I am to get on a plane with you, what about a bus? What's to stop me forcing the driver out of his seat and then running a load of people over? (GT Omnibus!)
Finally, I find it odd that you *do* object to the "other horseshit" involved in flying. Why is it that you object to all the other bits of Security Theatre (removal of shoes, limits on drinks, restrictions on what you can carry etc) but think that having an ID card to prove who you to be allowed on the flight is acceptable?