Loves my 4th Alfa
Join Date: Jan 2013
Location: United Kingdom
Legally you have to be told of the impending prosecution (referred to as a NIP - notice of intended prosecution). This is generally done verbally at the time the police officer reports you for summons at the roadside. If not done then they have 14 days to serve it on you in writing.
The court then have 6 months from the date of offence to deal with the matter as it is a summary only motoring offence (ie, can only be dealt with at magistrates court rather than crown court).
I think you will just have to sit it out and wait to see what arrives in the post. A summons will normally arrive within a month to 6 weeks but it depends on which police force is dealing with it and how many redundancies they have made.