On what basis are you hoping to go to court?
Were you doing 50 mph?
Ok. So were you doing more than 40 mph?
Well, in that case I would take the fixed penalty offer.
It is not all that likely you will win on this basis.
You can always put them to proof in court but you are risking costs.
It is quite unlikely that their devices have failed. That does happen sometimes as speed detection equipment is just a device like any other and devices can malfunction but there is always a presumption they have not unless you can raise evidence to the contrary.
If you are saying that you cannot do that but would like to put them to proof then that is something you are entitled to do but be aware of the risk of costs.
Can I clarify anything for you?
All the best.
yes, you can.
Costs would be about £450 - £600.
I have had higher costs orders but not commonly.