Quite a few do. There's a good article here on the pros and cons:

http://www.cleverdodo.co.uk/named-drivers-no-claims-bonus/31

Interesting points there Chris. I started with my with zero NCB as it was my second car. It wasn't quite as painful as it could have been as I was 23 at the time but it does make a huge difference having it.

I'm sure Kev will get the best policy he can as he will want her off his insurance as quickly as possible