Currently, those accused of drinking and driving whose readings are towards the lower end of the scale (lower than 50mg per 100ml) are entitled to demand blood/urine tests that are carried out by doctors only.
That is likely to change next year, as the government intends to allow nurses to perform the tests and, once mobile testing kits have been approved, roadside evidential tests will be admissible.
This is likely to generate a plethora of litigation as a result.
If you are facing a drink/drive prosecution contact Jeffrey Lewis immediately. If convicted you are likely to lose your licence, which in turn will have a drastic effect upon your ability to work and/or take children to school etc. Jeffrey has a terrific success record in these cases.