i think i know what he means, its like a ring, on some fabric like seatbelt fabric..altogether its about 4-5 inches long, i had one in my glove box when i had mine, and still not figured out what it is...dont know where it is now as my car is full of tools or id post a pic
That's the strap for the warning triangle holder - UK cars didn't come with a warning triangle, though.
Next you'll be wanting to know where the warning triangle holder is - I know but I've just spent 5 minutes trying to describe where and it still didn't make any sense.