I am almost entirely sure I was in the wrong but interested in your views mnetters!
I was driving up a fairly narrow country lane. It has national speed limit. I was probably going about 30 as it is narrow.
A land rover type car was coming the other way, slightly downhill ifswim, no idea how fast he was going.
As we passed there was a slight crunch and his wing mirror was damaged - though I stupidly didn't check this myself as I was a bit shaken and had kids in the back. Not a scratch on my car.
He was a bit cross though not rude and I said it was my fault, offered to pay or go through insurance. He took my details, said he would send me invoice for the repair. It shouldn't be too much as the wing mirror was still attached.
I probably was going too fast and visibility wasn't great as it's quite twisty. Wish I'd looked at his car but he was checking mine and didn't want to walk away with kids in back seat.