Hi Guys, I work for a company that manufactures and imports various laser diffusers (Jammers) and GPS speed camera detectors.
To clear up some myths- Radar and laser DETECTORS are NOT illegal.... YET.. there has been for years plans to introduce a law similar to that in mainland Europe but at present you are still allowed to buy sell and use DETECTORS.
However, Radar is only used in a very small amount of police forces now- Essex use what is called Mini-Gatso... basically a portable Gatso speed camera. Northumberland also use this. As for the hairdrier type hand held devices and 99% of all mobile van speed traps these all use laser.
Laser Diffusers are legal to buy and sell but they are illegal to use... its a very grey area as even if you are stopped with them fitted to your vehicle they still have to prove that they have been used to avoid being caught speeding. IN cumbria a gentlemen was arrested for using them consistantly as the mobile speedtrap operator had noted his reg. plate as an error occured... after this happened 3 times they got a warrant and stripped his car... The sentence can be severe and I have heard instances of people being jailed- though Im not convinced these are true... Even so the fines are serious and you shouldnt consider these products lightly.
Having said that, I have been using various makes of these jammers for 5 years now- hqaving helped me on numerous occassions. They will only help you against laser!!
My new golf has Laser diffuser/ Parking sensors fitted... I will be testing these fully next week with a laser gun to see how good they are.