Buckinghamshire CC ANPR cameras

[Roland Perry]

In article <002f01cccf8d$a58f6bc0$f0ae4340$@net>, James Firth 
<james2 at jfirth.net> writes
>> That's essentially the same as the 24-bit hash used by the Highways 
>>Agency, which while not unique to every vehicle is plenty good enough 
>> evidence in a murder investigation.
>
>Rather than give the entire feed to the police, surely it is possible to
>obtain a compromise whereby certain hashes can be added to a "watch list".
>Upon matching, the entire car index plate, location etc is revealed to the
>police.
>
>Oversight will then consist of accurate reports by the council/HA etc of the
>number of plates concurrently on the watch list each reporting period.
>
>This at least prevents some enterprising police forces storing the raw feed
>indefinitely.

I'd have thought historic data was of more use, and it depends on the 
query how intrusive it is. If hypothetically the police asked for "every 
Range Rover[1] in West London on 26th April 1999", that would be 
reasonably proportionate and not involve releasing the entire database.

[1] HA would have to ask DVLA for some correlating information.
-- 
Roland Perry