Hi, welcome to Just Answer. I will help you with your question.
Was damage done to your clothes and person based on the farmer's conduct? Is it his fault?
Yes most definitely to both questions
Okay. Then you should be able to sue for the damage done to your clothing etc., and you should also be able to sue for personal injury.
It's pretty straight-forward for you to do, and there is no reason you should be doing it without a lawyer on a no-win no-fee agreement. Many out there will do it for you.
Is there are specific issue you would like me to focus on to give you more information?
why does the farmer get away with hit and run. and using a vehcile as a dangerous weapon on intent to maim? just because 4 people state different things in there statement but the police have not accounted for that they all saw it from totally differant angles and tree's shrubs bushes vans also very high hay in the field.
The police have to prove things beyond all reasonable doubt. It is a very different threshold to the civil system, upon the balance of probabilities. This has to be taken into account by them when they decide whether to prosecute. When you have numerous witnesses saying different things, this can make it difficult to achieve the criminal standard. You could ask the police review their decision, and you could escalate it if necessary to an officer further up the chain, such as an inspector.