Continuous insurance enforcement is the UK rule that a registered vehicle must be insured at all times unless it has a Statutory Off Road Notification. Keeping an uninsured registered vehicle is an offence, even if it is never driven.
In one line: Continuous insurance enforcement requires a registered vehicle to stay insured unless declared off road.
How continuous insurance enforcement works
Under continuous insurance enforcement, the DVLA compares its vehicle register with the Motor Insurance Database. A registered keeper whose vehicle appears uninsured, and which is not declared off road by SORN, can be penalised.
A keeper who lets cover lapse without making a SORN may receive an Insurance Advisory Letter, then a fixed penalty of 100 GBP. The vehicle can also be clamped, seized or destroyed, and court action can follow.
The rule targets the registered keeper rather than the driver, so simply not using the car is not a defence without a SORN in place.
Continuous insurance enforcement vs SORN
Continuous insurance enforcement requires insurance unless the vehicle is formally off the road. A SORN is the declaration that takes a vehicle off the road, which removes the need to insure or tax it while it stays unused on private land.
Keeping a car on a public road always requires insurance, because a SORN vehicle must be kept off the road.
Primary source: GOV.UK: Vehicle insurance