For about a year I've had a tow pole under the floor of the boot. At last I got to use it - a freind's just snapped a throttle cable.
Wow - it ain't 'arf better than a tow rope, innit!
Originally it wouldn't fit on the back of my car - it's supposed to go onto the lashing points at each end, but mine's too fat for the pole's fitting - so I cut the hook off and welded a spare trailer coupling on so it fits my towball. I was only towing a Citroen AX, but even so it was so easy compared to a rope.