Revision question · Drivers' hours and rest periods

When should a compatible security lock be fitted to an uncoupled trailer’s kingpin or drawbar eye?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

When it's being driven on a motorway

When it's being driven abroad

When it's being used partially loaded

When it's left unattended

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When it's left unattendedThis was the right answer

Fit the suitable lock before leaving the uncoupled trailer unattended to obstruct unauthorised coupling. Follow its instructions; this is a security device for a detached trailer, not a lock to fit while towing.

Reviewed reading for this question

Block unauthorised coupling of a detached trailerReviewed guidance summary · The revised question identifies the OEM lock’s actual unattended, uncoupled use.

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