The immediate impounding of an apparently uninsured vehicle replaces the former method of dealing with insurance spot-checks where drivers were issued with an HORT/1 (so-called because the order was form number 1 issued by the Home Office Road Traffic dept). This 'ticket' was an order requiring that within seven days, from midnight of the date of issue, the driver concerned was to take a valid insurance certificate (and usually other driving documents as well) to a police station of the driver's choice. Failure to produce an insurance certificate was, and still is, an offence. The HORT/1 was commonly known – even by the issuing authorities when dealing with the public – as a "Producer". As these are seldom issued now and the MID relied upon to indicate the presence of insurance or not, it is incumbent upon the insurance industry to accurately and swiftly update the MID with current policy details and insurers that fail to do so can be penalised by their regulating body.
You might have a roommate or family member on your policy that no longer drives your vehicles. Or maybe you have a vehicle on your policy that is no longer being driven. Making sure driver and vehicle information is up to date may save you money. Keep in mind, if you do go down to just one car on your policy, you will lose the multi-vehicle discount.
But liability coverage levels come in threes — you’ll probably see something like 50/100/50 up to 250/500/250 in typical policies. You can think of these limits like: individual injuries / total injuries / property damage. Insurers are a little more technical, calling them bodily injury liability, total bodily injury liability and physical damage liability.