The plod have more cost effective ways of "reducing" recorded crime. Can't find the recent reports regarding this, but this is a taster
https://www.telegraph.co.uk/news/ukn...nk-report.html
If I remember right Warwickshire "filter" out about a third of reports.
Toys like that camera enable them to up the stats of convictions, so it looks good to the politicians. Having a traffic car parked on a ramp in clear view might actually prevent folk from committing the offences in the first place, but that doesn't show up on the stats so of no interest to them.
Their duty is to "uphold" the law, whether they "enforce" it is up to the management.