What if the reading is borderline?
If the lowest reading is 39 microgrammes or below, you should be released with a warning. Between 40 and 50 microgrammes you should then be given the option of blood/urine tests. Whichever option is taken, is for the Police to decide. A urine sample is on the basis of 2 samples within 1 hour. A blood sample must be taken by a Police surgeon. You can demand 2 blood samples are taken which can be useful in defending the charge.
