Wills and Estates

Have been chatting with my brother about our father's estate and finally got a look at the will. My other brother James has been purposely dis-inherited and I think it's a bit shit. Is there any way to override a will and if all 3 of us agree to go against the wishes in the will. My father was just being a spiteful bastard and the two of us don't feel that the will was made out fairly and disagree with it.