It's the Attack of the Killer Supermarkets! Or at least, it seems that way when it comes to the supermarket insurance wars.

One broker was left fuming this week when he saw two motor quotes massively undercut by Wal-Mart's UK retailer, Asda.

When sourcing quotes for an imported Nissan, the best deal the broker could find was £981. The policyholder shopped around, and found Asda offering £320. Another quote was slashed from £761 to £380. Backchat can only surmise that "That's Asda Price!"