TB - hope the brown envelope does not land on your doorstep in the next 14 days....
Couple of things in no particular order that are relevant to the thread, not to your particular circumstances, hopefully.
Nicking threshold varies from Force to Force and even then, road to road. Used to be a blanket speed limit +12 mph (inclusive) but this has dropped considerably by Safety Camera Pratnerships... Most 'real' traffic cops still interpret the limits realistically to ensure a balance between safety and traffic flow. For example, sometimes its a bad idea to have an artic lorry doing his legal limited 40 mph in 'rush hour' morning or evening traffic on a single lane A road rather than the mechanical limited 56....
£60 and three points for a straight forward speeding. Higher speeds, contentious locations (outside schools) can get more.
Points count towards totting up for 3 years but remain on your licence for 4. Or 10 years and 11, in the case of a 10 year drink/drive ban.
5 years is the general countback for insurance companies, but some of the cheaper premium ones look for further back in order to keep the premiums acceptably low and get your business. Take care to answer the q's on the proposal form (or tele call) correctly as any failure to intimate facts is deemed a material non disclosure and insurance could thus be voided. Be a b*gger if your pride and joy just got clobbered by a lorry.....
Laser and jamming. Its an offence under the Wireless Telegraphy Act as priviously pointed out to jam or disrupt the signals from the speed detector. Further, in Scotland, you could also be reported for section 41(1)(a) of the Police (Scotland) Act whereby you obstruct, molest or hinder an Officer (and a camera operator as far as this act is concerned is also an 'Officer') in the execution of their duty.
Speed detectors and similar. The court case referred to where use deemed lawfull applied to England and Wales
only. Strictly speaking, speed detectors in your vehicle are stilled deemed unlawful in Scotland and nickable. No offence to sell them in Halfords or similar or indeed for you to buy them, but an offence to use and react on 'info' received!!
HtH
B