I stopped the car and looked around and could see nothing.
Tyres all good and attached to the rims!
Looked underneath and could see nothing trapped that I was dragging along
Turned the front wheels and could see nothing caught
Used a torch on front and rear wheelarches and nothing
I turned the car round and tried turning the steering wheel/braking/accelerating and this most horrendous metallic noise (the kind you might expect if a bush had come off a rotating spindle and there was metal to metal contact) was still there, accompanied by what appeared to be a rotational clunk.
I very slowly drove what was probably a few miles but seemed like eternity and decided to call the RAC. Not having a safe place to stop I decided to go a few hundred yards up the road to a McDonalds where I could wait in the warm with a coffee. As I got there it got a lot better. I then, instead, drove on further at 40-50 MPH and finally it stopped. A hundred mile drive home in pouring rain was not the best when I was dreading something coming off or falling apart.
No noise at the moment and tomorrow it goes into my local dealer but what on earth could it be?
