"You can't drive in those" I told one of my female students this week as she got in the car for her lesson in a nice pair of diamanté covered flip flops. Surprised by this she then offered to drive 'bare footed' for which I also had to refuse her. Put simply, you need to be wearing suitable footwear when you're driving a car and that usually means a decent pair of old flat shoes that will stay on your feet and not fall off and jam under the pedals. Heels are fine of course but (I'm told) it doesn't do them any good and may break off the heel part.
This simple philosophy not only applies to learners, but to all drivers so please don't drive in loose fitting sandals and (unless you're heading for the beach) avoid driving completely in the humble flip flop this summer. Be safe!