Speeding - mitigating circumstances?

I was recently sent a NIP and the speed limit was 40mph on this particular road,and was told I was doing 51mph.

My SatNav gives me a different speed as to that of the van speedometer. Given that

I have two different readings,and the mobile camera is subject to various anomilies, commuincation equipment, including operator's mobile phone must be switched off while measurements of speed are being taken, can I have some sort of fighting chance to have my fine reduced or cancelled altogether?

Asked on 5 December 2011 by Terry J

Answered by Honest John
No. Sorry. You can accept the fine and points or hope you get offered as speed awareness course instead. If you fight your case and lose you could end up with a £500 fine, £15 to victim support and up to six points.
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