Do you think i would I have a case here? (Going to get legal advice soon)?

Since you are in the UK you drive on the left and pass on the right unlike Texas where you would drive on the right and pass on the left so the tractor turning into your vehicle behind the door would be ample proof that the tractor turned into you when you were almost passed if it was in front of the door then it could go for the tractor, you should emphasize to your insurance company the manner in which they hit you and fight it.}{