Hi,
In the first instance
I would write to Humberside Police and ask for the officer using the equipments up to date certification of competency and training for use.
I am assuming you were cautioned and interviewed at the roadside and signed either the officers notebook or record of interview admitting the offence?
When you receive the court papers you will have the opportunity to offer mitigating circumstances to the offence, you will need to think very carefully regarding how you respond to this.
It wouldn't hurt to speed to the speed enforcement team at Humberside to request this information and an update,
the police have to date met their obligation by advising of the intended prosecution.
I personally wouldn't sit back and wait for a ban,
you will undoubtly understand and accept in hindsight that what you did was wrong,
however if your mother was ill and your mind elsewhere it's not unreasonable to believe the national speed limit applies on a dual carriageway.
Hope this helps. Kind Regards
Chris
Apologies I was supposed to write speak to the speed enforcement team... Not speed, done enough of that.