It is 6 months for speeding fine notification.
I wouldnt worry to much I was cationed for having my insurance in my maiden name, when i had to do a producers which made mine invailed, and the same was said to me that they would need to speak to the person who issuing officer all because a light was out.
I worried for three months like you and in the end i contacted the police station and asked the question if any further action was going to be taken. at least you will know one way or ther other.
a bit of info for you
If the police already know you are the driver and you have been told that you will be reported, or if information has been given to the effect that you were the driver at the material time, then you will usually receive an offer of a fixed penalty. If you accept this, you will be fined �60 and your licence will be endorsed with 3 penalty points.
In more serious cases or, if you fall foul of the totting up procedure, the fixed penalty procedure will not apply. You will simply receive a summons which the police must apply for within 6 months of the date that it was known to them that you were the driver. This will tell you when your case will be in court.
If you plead guilty to, or are found guilty of a speeding offence, the Court has an unfettered power to disqualify you, fine you up to certain limits, and order you to pay prosecution costs. Points are awarded on a sliding scale between 3 and 6 penalty points � the higher the speed the greater the number of points that you will receive.If you want to know more about totting up or the penalty points system generally, please go to the section on penalty points.
I hope all goes well and the info helps you a bit