I think this this may be an example of someone getting total bullshit published.
The Sidewinder is an air-to-air missile. It's a heat seeking missile, not a radar guided weapon. (Except for the few radar guided ones made for F-8s that eventually got transformed into AGM-122s, that the RAF never had F-8s, and the F-8 exited service in 1999). Also, the hand held radar devices that the Police use have a measuring range over a few hundred yards. Were it a laser device, at least the first three sentences would be more plausible.