I did the same Chuff a while back - Metro broken down two young ish ladies sat in it people queing behind it.
I drove past as i had to be somewhere about 30min later on the way back it was still there!
I pushed it (on my own with other drivers watching!

) into a layby out of the way as she had already called the AA. Took all of 5 minutes. She was very grateful indeed

It just something I will always do!