That is a new government policy (from Labour) not just your insurance company. Many 2 car owners, are not happy about this, specially those with summer convertibles and campers, they have to either tax them all year, or go through the hassle of unsorning and sorning every summer, along with the rigmarole of getting a refund on the remaining tax.
I know it is a government policy, the insurance company were just letting me know - an insurance company could'nt just go around fining people with uninsured cars could they lol.
The problem you have is many people still have unisured cars - indeed I have first hand experience of the system causing people hassle, Quinn Direct's system knocked my car off for 3 days last month, and sods law, during this time I was pulled on a Xmas drink driving campaign. Whilst I was zero on the meter lol, the standard insurance check they do when they pull you called me up as uninsured, and though at first the PC was satisfied the car was insured after speaking to the MIB (my own bloody fault as I didnt have the certificate in the car), and was writing out a producer, her jobsworth mate decided the vehicle should be seized, causing me hassle and cost.
At the end of the day, the plod can only go on the information they are given, and ive pretty much forgotten about it now, but I can see their point of view, if I had been driving without insurance, then I shouldnt have been on the road, and there are many people who are driving without insurance, knowingly, and are prepared to take the risk because the chances of them getting caught (because they have to be pulled to be caught until now, whereas now they will get a fine and eventually the car siezed if the car is uninsured for a significant time - though I await to see the bloody loopholes solicitors tears out of it lol) is still pretty low. So im all for this new system. I do hope it takes some plod off the roads and back to real policing though, you see plenty of people getting pulled, mostly random stop-checks etc, but very rarely see a police officer on the beat, helping to prevent ASB, which is a much more serious and damaging crime imho - though I guess that would mean the plod actually getting off their arses and confrontting yobs, and half of the plod are either pansies or fat lazy slobs, who have been in a secure job too long with little or no pressure to perform, so long as they can pull a few people in cars every day.