Very embarassed and cross with myself at having ignored my gut instincts earlier today and listened instead to the man on the sat nav, trying to get me from A - B. I ended up driving approx. 50 miles out of my way to get three teenagers to a music festival. Turned out the sat nav had 'remembered' my previous trip (even though I hadn't saved it) and had happily taken me in a south-easterly direction (on the motorway when I knew I shouldn't really have been on the motorway) when I should have been going in the opposite direction!!
But I stupidly carried on driving and didn't question it for a long time until I suddenly twigged that I'd been on this road two weeks previously taking my DC to a school camp! 
Has anyone else done something this stupid before, or is it just me? I knew I was wrong, but I blithely carried on listening to my Australian bloke on the sat nav telling me to put my sunnies on and not let the seagulls steal my chips!
I am in the perimenopause though which might explain my dim behaviour...