This is actually a serious question. How do you go on with declaring that you've fitted the wrong sized tyres to the wheels?
Well I phone insurance company and tol them i'd modified the car.
Told them I had coilovers, new wider wheels (told them dimensions), said I had a slight bit of stretch on the tyres (told them dimensions), Said I had painted the interior but they said that didnt matter, Then mentioned the induction kit, remap etc... They charged me admin fee and that was it.
The way they work is if you have a crash they run the insurance through on your car standard but don't replace the mods that you have on the car.
Trust me no matter how hard you try and pull my car apart its all legit even if its hard for some of you to understand.