In short
The official UK practical driving test marking sheet used by every DVSA examiner.
The DL25 is the marking sheet UK driving examiners fill in during the practical test. It records driving faults, serious faults and dangerous faults across about 30 marked categories.
Fifteen driving faults (or one serious fault, or one dangerous fault) results in a fail. The DL25 is what your instructor will reference during a mock test debrief.
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