Just 2% of complaints made about illegal driving instructors have resulted in a conviction over the last five years.
The data, obtained by Hippo Leasing via a freedom of information request to DVSA, reveals 961 complaints about unqualified instructors taking payment for lessons since 2014, with only 18 convictions.
The data reveals not a single prosecution was made for illegal driving instructors in the 2014/15 financial year, despite DVSA receiving 125 complaints from members of the public.
DVSA says that multiple complaints may have been about the same instructor, and there is no indication whether the complaints this data relates to were valid.
Since the 2018/19 financial year, DVSA decided to make prosecutions for these offences itself, rather than rely on police and the Crown Prosecution Service.
DVSA said: “We have stringent measures in place to detect fraud and bring offenders to justice. Obtaining co-operation and witness statements is a vital part of the evidence required to prevent illegal driving instructors from operating. Therefore DVSA encourages individuals to come forward and work with our investigators.”