What is the 10-minute rule at car auctions?

At most UK car auctions, buyers get a limited viewing window — often referred to informally as a "10-minute rule" — to inspect a vehicle before it goes under the hammer, rather than the extended, unhurried inspection you'd get with a private sale or dealer viewing.

What this means in practice:

• You typically get a short window to walk around, look under, start the engine, and check obvious signs of condition — but not the kind of thorough test drive or extended mechanical check you'd normally do before buying a car
• There's rarely time to run detailed diagnostics or investigate anything beyond what's visible or immediately apparent during that window
• Once the lot is sold, there's generally little to no recourse if a problem emerges afterward that wasn't caught during the limited viewing

Why running a check beforehand matters given this time limit:

Because the in-person viewing window is so short, the auction catalogue (which lists each lot's registration number ahead of the sale) gives you a real opportunity to do your homework before you even arrive. Running a check against the registration in advance — covering things like mileage history, outstanding finance, write-off status, and stolen reports — means you're not relying solely on a few rushed minutes of visual inspection to catch problems that a document-based check would reveal instantly. Buyers who only rely on the on-the-day viewing are taking on considerably more risk than those who've already done some homework on the lots they're interested in beforehand.