mate this could be many different issues really.
The words tank slapper, well that could be shocks/steering damper. Check that these compress and release evenly.
wheel bearings, check for play, but this could be king pins, if it is top and bottom, but also chack that the wheel spins freely, with no adverse noise.
It would be wise to check them, you should have an open race bearing and you can check the balls once clean for wear and tear.
Where abouts in North Devon are you?
Andy Sparks wrote: