"This device measures distance and time by the operation of two switches and then computes the average speed of the vehicle being checked. The instrument may be used by the police vehicles in motion or while parked. It may be used at night or in the day time and in foul or fair weather. It is not necessary for the police to be travelling in the same direction as the target vehicle, nor to follow that vehicle at an even distance, nor to pursue it. The instrument is electronic and has, at its heart, a simple computer. It omits no signal and does not interfere with radio transmissions or reception. Only an electrical failure in the vehicle in which it is installed can effect its working or accuracy."
"(20)(1)Evidence ... of a fact relevant to proceedings for an offence to which this section applies may be given by the production of— (a) a record produced by a prescribed device, and (b) (in the same or another document) a certificate as to the circumstances in which the record was produced signed by a constable or by a person authorised by or on behalf of the chief officer of police for the police area in which the offence is alleged to have been committed; but subject to the following provisions of this section. (2) This section applies to— ... (d) an offence under section 89(1) of [theRoad Traffic Regulations Act 1984 ] (speeding offences generally); ... (4)A record produced or measurement made by a prescribed device shall not be admissible as evidence of a fact relevant to proceedings for an offence to which this section applies unless— (a) the device is of a type approved by the Secretary of State, and (b) any conditions subject to which the approval was given are satisfied. ... (6) In proceedings for an offence to which this section applies, evidence ...- (a) of a measurement made by a device, or of the circumstances in which it was made, or (b) that a device was of a type approved for the purposes of this section, or that any conditions subject to which an approval was given were satisfied, may be given by the production of a document which is signed as mentioned in subsection (1) above and which, as the case may be, gives particulars of the measurement or of the circumstances in which it was made, or states that the device was of such a type or that, to the best of the knowledge and belief of the person making the statement, all such conditions were satisfied. (7) For the purposes of this section a document purporting to be a record of the kind mentioned in subsection (1) above, or to be a certificate or other document signed as mentioned in that subsection or in subsection (6) above, shall be deemed to be such a record, or to be so signed, unless the contrary is proved. (8) Nothing in subsection (1) or (6) above makes a document admissible as evidence in proceedings for an offence unless a copy of it has, not less than seven days before the hearing or trial, been served on the person charged with the offence; and nothing in those subsections makes a document admissible as evidence of anything other than the matters shown on a record produced by a prescribed device if that person, not less than three days before the hearing or trial or within such further time as the court may in special circumstances allow, serves a notice on the prosecutor requiring attendance at the hearing or trial of the person who signed the document."
"On the prosecution of a person for any speeding offence, evidence of the measurement of any speed by a device designed or adapted for measuring by radar the speed of motor vehicles shall not be admissible unless the device is of a type approved by the Secretary of State."
"The provisions ofsection 20 of the Road Traffic Offenders Act 1988 are unequivocal. The prosecution is required to prove that the Secretary of State has approved the use of the radar gun before the measurement of speed given by it can be admitted in evidence. It was conceded by the prosecution that without that material the conviction could not be sustained. Accordingly on that ground this appeal should be allowed. This conclusion is confined to the specific facts of this case."
"...were we wrong in law to rule that: A. The appellant's failure to strictly comply with the service requirements contained in subsection (8) ofsection 20 of the Road Traffic Offenders Act 1988 precluded us from admitting in evidence the digital images produced by the Speed Violation Detection Deterrent System recording the respondent's speed? B. And having ruled the evidence produced by the Special Violation Detection Deterrent System inadmissible, PC Troup could not use the data as an aide memoir and effectively adopt it as his own personal testimony."
"The effect of section 20(1) and (8) amounts to this: evidence of a fact relevant to the proceedings, may, and I emphasise may, be adduced by the record produced by a prescribed device, and a certificate as to the circumstances in which it was produced, being served on the person charged not less than 7 days before the hearing or trial. If a copy of the record and the certificate is served not less than 7 days before trial, and if not less than 3 days before trial, or such further period as the court may allow, the person charged serves on the prosecution a notice requiring the attendance at the hearing of the person who signed the certificate; the document, or documents if the record and certificate are in separate documents, will not be admissible as evidence of anything other than the matters shown on the record produced by the prescribed device. In those circumstances, the officer will be able to give evidence of the circumstances in which the record was produced and the record itself will be admissible in evidence. The question raised by this appeal is whether the same applies where there has not been compliance with the provisions of section 20(8). It therefore is necessary to consider the proper construction of section 20(1) and (8). In my judgment it is permissive, and does not exclude the possibility of evidence of the record produced by the prescribed device being adduced in another way."
"were the justices entitled to take judicial notice of the use of the Police Pilot Provida device in a large number of police cars to find that the device was approved by the Secretary of State and that evidence of that device was admissible."
"In short, Mr Hehir submits that there was an alternative route by which the magistrates could have convicted the appellant. In that connection Mr Hehir has drawn the court's attention to the well-established law that outside the code established by section 20 it has always been open to the prosecution to prove evidence of speeding by, for example, the opinion of a police officer or indeed any other member of the public, that is necessarily corroborated, as required by the legislation, by reference to other devices. That was firmly established as a proposition after some confusion in Nicholas V Penny [1952] All England Reports at page 89."
"Were we entitled to admit the oral evidence of PC Stock as to the results of his check using the Police Pilot device as corroboration of his opinion that Mr Connell was exceeding the 70mph speed limit?"