roughly a month ago i posted that i was caught speeding. its been about 3 weeks since the relevant authority would have received the form i filled in & i still haven,t heard anything. is it normal for it to take a few weeks ?
Assuming the "form you filled in" was the initial Notice of Intent to Prosecute (aka NiP), then you just have to sit and wait because it all depends what happens next. It'll probably be either a Conditional offer of a Fixed Penalty (CoFP) which will be 3 points and a £100 fine, or the offer of a Speed Awareness course.
They have 6 months from the date of the offence to 'lay papers' at the magistrates court - which will eventually result in a summons from "The Beak". If the CofP or the Speed Awareness offer arrives in month 5 (or later), then a timeout may be possible, but from what you say you're still 4 months from that.
It sounds like you returned the NiP fairly promptly (less than a week?). In the future, don't return it earlier than 25 days after you received it!