Up until June 2007 I had two cars both with 10+ NCB.
At the time they were both underwritten by the Post Office.

I received a company car in June 07 so i sold one car and cancelled 1 insurance. They issued me with a NCB letter.

I still insure my current car with Post office.

It used to be that your unused NCB certificate was only valid for up to 2 years. If this is still the case how can I make sure that it does not expire in May?

Would it be possible to ask the PO to use the other Cert on renewal?

What if a buy a moped for £25 and insure that 3rd party?

It has taken a long time to get 2 full NCB and I am reluctant to lose one?

Any (legal) advice on how to keep the unused one intact would be welcome.

i believe this is still the case, my mum managed to loose her NCB a few years ago because of this

the moped idea wont work as insurance company like to keep motorbike insurance separate. when i insured the rs125 they wouldn't entertain the idea of accepting my NCB....but this might just be them

when i had 3 years NCB on my bike they wouldn't move that accross on to the car i wanted to insure.....

Direct Line have offered, in the past, to let me transfer my bike NCB to a car policy, but I don't know if they still do.

If you're going down the moped route then try somebody who insures bikes and cars, they'll probably be more open to the idea. I'd have a word with H&R insurance and Carole Nash and see what they'll do.

im in the same boat apart from mine ran out in september (had a company car). Some insurance companys will still except it after 2 years just deepends on how much they want you bussines.

insure a 1.0 car, cancle after a month and they wil provide you with another NCB certifacate

if you want a car reg to insure i have a vectra sitting about your welcome to insure that its not moving for the next couple of months

Well if you change your insurance before the one expires use that proof instead of the "current" one. Then you have another two years to go.