1) Laser and Radar jammers are illegal in this country, so don't go there kids.
2) Laser
detectors are legal to own but somewhat illegal to operate (which is why the new Road Angels don't come with them).
I've got a Pogo Alert like Robin does. It's a nice compact unit with a mahoosive display that displays speed. It has a detachable laser detector to make it comply with the law.
I hard wired mine in next to the A-pillar on the driver's side so I can look at it without having to avert my gaze too far from the road. It's quite a neat unit.