Bull bars make sense on vehicles where driving on and off road carries a significant risk of collision with large animals, and where the vehicle is so remote that breaking down due to a collision could put the driver's survival at risk. Kangaroo strikes in the Australian outback, Antelope and the like in parts of Africa. Unless you are building this for some very serious overland travel the only large animals you are likely to hit in East Sussex are people, and it is their survival not yours that is at risk.