Well, the thought did cross my mind to check and loosen the plug slightly, but i didn't, and went on and run engine for 10mins with Wynn's engine flush for diesels, It states not to be driven with this in. Bugger, the drain plug nut was rounded, made worse by me! So, i called around and eventually found autostore that sells oil pump which removes the oil via the dipstick, has anyone done it this way before? Will it remove sludge? I suppose it will have to do till i get car to garage.