The awareness course costs less than the fine. If you go to court it will cost you much more when and it really is when, you lose. Never go to court for a motoring conviction unless you have to. And by that I mean you receive a summons and not you electing to go to court.The whole system is designed to make you not want to go to court because petty things like this take up too much time
You can ask to see the evidence first obviously. It is really strange this hasn’t been provided
The 12 hour shift could be seen as evidence of driving when tired and therefore without due care and attention.
The cheapest and simplest option is do the course. Costs you less and you get no points.
You go to court you will get a bigger fine, possibly more points, costs for the prosecution and a victim surcharge, even if there is no victim
It’s one thing having principals it’s another thing entirely when it’s costs you so much more.
My advice would be to contact the officer, ask to see the evidence and then take the course