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 technolog

 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 technolog

 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 technolog

 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 technolog

 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 technolog