Land rover discovery 3 tested leaking water

Was working perfectly never gave any trouble always serviced and minded Has test until October Started pissing water still starting and driving Was told water could be leaking around oil pump Could be head gasket don't know Not been overheated or driven since Could be easy fix. Starts and drives but I was told not to start it until fixed in case fluids mix etc Cheap fix for someone with time. Just need gone now might swap/ trade for good running jeep Hilux Navara l200 Isuzu dmax land cruiser mitsubishi pajero shogun sport defender range rover pickup commercial tax crew cab Toyota