Hi, I have offroad insurance as part of my policy with lancaster, And this is very important if you are going offroad as you will find that if you venture onto land that is not classed as a public road, then the police can seize your car as an unisured vehicle.
I spen a lot of time offroading and i would not venture offroad without insurance, as you know the police have been taking motorbikes driving on land for no insurance and these then end up being crushed and the owner being fined a lot of money.
So i suggest that you contact a 4x4 insurance specialist and see if this can be purchesed seperatly or on a day by day basis.