(my daughter paid a speeder that was probably earned by a cloned number - couldn't remember having been on that road anytime but paid up anyway)(she'd forgotten that my wife had the plates stolen off that car while she was in work)
They should issue the Notice of Intended Persecution(sic-joke) within 14 days of the offence. If you are the registered keeper and the records of where you can be contacted are up to date then that stands.... However, if you aren't the registered keeper then they only have to contact him within 14 days and he has to give your name and details as the person in charge of the vehicle at the time of the offence...they can probably take six months to find him then and he still has to answer to the charge.
If you are the registered keeper and have changed address without informing the authorities then they don't have to contact you within 14 days.
It's the initial notice that has to be completed in the 14 days. After you have informed them who the driver is then, yes, six months to issue a summons etc could be correct.
The main thing in your case is that they haven't contacted you in 14 days. You now know wether that means you are off the hook.
The undertaking issue could look like you were overtaking him (assuming the equipment used wasn't taking two pictures in which case it would be obvious who the offender was). If there are markings on the road then it would be fair to assume that two pictures are taken to illustrate how far the target has travelled. Lasers can take up to 43 frames...each one indicating a calculated speed..some frames possibly showing a minus figure to show that you actually went backwards a couple of times during the third of a second that the equipment had to prove it's inadequacy.....
If tyou do get a speeder you need to be happy that the road signs are correct and legal......http://www.youtube.com/watch?v=p4I-IlYm ... re=related