If you’re a self-employed courier or delivery driver, you may be better served by goods-in-transit insurance, which offers cover for items (such as packages) while they’re in your van. If you carry passengers in return for payment, you’ll need to get taxi insurance.
If you rely on your van for your job, then it might be worth adding breakdown cover to a regular policy. And some policies may offer a courtesy van as a replacement if your vehicle gets damaged, lost or stolen. This could be handy if you can’t afford to wait for your vehicle to be recovered or repaired.