In a drink driving prosecution, the entire case against you rests on a single, crucial piece of evidence: a number. This number—the reading from an evidential breathalyser or the result of a blood or urine analysis—can seem like an irrefutable scientific fact. However, this "fact" is the end product of a complex chain of technology, scientific procedure, and forensic analysis, and every link in that chain is a potential point of failure.

A successful defence is often not about arguing the law, but about challenging the science. The best drink driving solicitors are not just legal experts; they are also part-forensic-scientists, possessing a deep and technical understanding of how this evidence is produced and where its weaknesses lie. This guide will take you inside the forensic lab to explore how a case can be won on the science. At Motoring Defence, this deep technical expertise is a cornerstone of our practice.