Changed rear wheel speed sensor .. nothing unusual there, just a 10 minute job.
Put the wheel back on, put the tools away, cleared the code and went for a test drive, circular route, couple of miles or so - all good.
Hang on ... where's my locking nut key?
Tools? nope not there.
In the car? nope.
On the floor where I was working? nope.
In my pockets? nope.
In the kitchen when I made a coffee? nope.
So now I'm beginning to panic ..
Oh ffs .. I have a sinking feeling ..
Took a slow 2 mile walk, looking every which way, nope.
Researched "how much is this going to cost me?" answer: A trip to a stealership and approx £35 - £40
Took a slow 2 mile drive.
"hang on, what's that at the side of the road?"
"no way! yay! woohoo!"
I've never actually kissed a locking nut key but I came mighty close
Turns out that I'd driven 1.8 miles with the locking nut key still on the locking nut before it fell off and rolled under a parked car.