Some people obviously never listen to the interview.

It really is worth listening to Doug.
Just listened to it. I think they're making a drama out of a crisis. I've never driven a BMW but I know enough about cars to suggest he's mistaken. Switching off the ignition would not lock the steering. He would have lost the power steering but it would still have been controllable. If he'd steered onto the hard shoulder & switched off the ignition before burning the brakes out the brakes would still have worked. Panic over.
Instead of doing this he took at least one hand from the steering wheel in order to phone the AA & also speak to the police while driving a car without effective brakes at over 130 mph for miles along a busy motorway. It's a miracle he never killed some unfortunate innocents along with himself. As Charlie said earlier, maybe a few lessons on how a car actually works wouldn't come amiss before being allowed to take them out on the roads.

PS.
Well they had Britains top female racing driver on. (think it was Susie Stoddart). She said he was quite right in not turning the engine off as it would have been the end. It would have locked the car steering and he would have crashed.
I suggest she doesn't know what she's talking about either.