"I am going to do another test. I am not happy about it, I can't use that one. If we get the same reading we will have to go for blood."
"When in the course of an investigation into whether a person has committed an offence contrary tosection 5(1)(a) of the Road Traffic Act 1988 , that person provides two specimens of breath into an approved device and the operator has reasonable cause to believe that the device has not given a reliable indication of the proportion of alcohol in the breath and thus the operator requests that further specimens be provided, is it incumbent upon the operator (the request having been acceded to in principle) to formally require that those two further specimens of breath be provided and to issue the warning detailed insection 7(7) of the Road Traffic Act 1988 , irrespective of the shortness in time that has elapsed since such a warning was given when an earlier, and void, test took place?"
"(1) In the course of an investigation into whether a person has committed an offence under section 3A, 4 or 5 of this Act a constable may, subject to the following provisions of this section and section 9 of this Act, require him - (a) to provide two specimens of breath for analysis by means of a device of a type approved by the Secretary of State, or (b) to provide a specimen of blood or urine for a laboratory test. ... (3) A requirement under this section to provide a specimen of blood or urine can only be made at a police station or at a hospital; and it cannot be made at a police station unless - ... (bb) a device of the type mentioned in subsection (1)(a) above has been used (at the police station or elsewhere) but the constable who required the specimens of breath has reasonable cause to believe that the device has not produced a reliable indication of the proportion of alcohol in the breath of the person concerned... But may then be made notwithstanding that the person required to provide the specimen has already provided or been required to provide two specimens of breath. ... (7) A constable must, on requiring any person to provide a specimen in pursuance of this section, warn him that a failure to provide it may render him liable to prosecution."
"A person does not provide a specimen of breath for... analysis unless the specimen - (a) is sufficient to enable the... analysis to be carried out, and (b) is provided in such a way as to enable the objective of the... analysis to be satisfactorily achieved."