Supermarket shoppers first in line for car insurance discounts

We've all been there when filling out insurance paperwork – name, address, driving history. It's all essential for insurers to assess how much of a risk you'll be to insure, and help them calculate premiums accordingly.

But if you're one of thousands who buys car insurance through a supermarket such as Sainsburys or Tesco, it's not just a good driving record that could drive down your premiums – it's a good shopping record. The two supermarkets have both admitted that they use data about customers' grocery shopping habits to set prices for car insurance, and give the biggest discounts to regular shoppers who make predictable visits.