Has he queried it with the garage that did all the work?
Also, according to the following link, the minimum efficiency is 58% for an MOT pass. How did it pass at 56%?
mattersoftesting.blog.gov.uk/changes-made-to-brake-performance-test/
"The minimum brake efficiency requirement for ‘M1’ vehicles first used on or after 1 September 2010 has been increased to 58%. ‘M1’ vehicles are defined as: passenger vehicles with 4 or more wheels and not more than 8 passenger seats in addition to the driver’s seat. Obviously this covers cars, but also includes ambulances, dual purpose vehicles, motor caravans etc."
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