They're not offset but always on the centreline.
The Trident airliner was designed for use in Cat 3 conditions and it was so accurate that they designed the nosewheel offset so that it didn't hit the centreline lights when carrying out an autoland.
I was under the impression that the avionics at the time took up so much space the nosewheel had to be moved off to the side to fit it all in.
My bad if I'm wrong.