Disco 2 Front hub/axle seal leaking

hello all! driver side hub seal is leaking and no matter what i do, i cant seem to fix it! The shaft is a heavy duty Ashcroft shaft. It did not come with new sealing shield but i did have an engineer make me a new one to be sure that wasnt causing the leak. I did replace the seal a few times to be sure and the ball joints are also new. ball joints are lemforder and i always used genuine lr seals. the only thing that i can think off is if there is some sort of adjustment that can be done to the axle. noticed there is a nut at the bottom, apart from that im truely stuck!

The only halfshaft seals which seem to work are Nak.