Maz, i know a trick that works, but its up to you if you want to risk it.
I am assuming that you have a good amount of NCD on your current policy.
Firstly is your policy up for renewal soon on your 182?
If so, then you can do this.
Set up two new policies with different insurance companies for the two different cars you need to insure and inform them both that you have 5 years NCD (if thats what you have)
In turn they will both ask for proof of NCD from your previous insurer, this can either be your renewal notice, or a letter confirming your entitlment.
Ask your old insurance company to send you your NCD proof, which you can then send to your first insurer recorded delivery to ensure they receive it.
Call your previous company again and tell them that you never received the proof they were meant to send you and ask them to send you another copy.
When this arrives, send it to your other insurance company recorded and your sorted, both will have received proof of ncd
No questions will be asked, as the start and end dates of all the policies add up. If you ever get caught (which realistically it is impossible to be found out) you can just play dumb and explain you never knew that your NCD could not be used on two vehicles
Ta Da, all done
( i am not saying that fraud is the right thing to do, but playing dumb certainly is )