As the topic description says I have a strange knocking noise when driving down the road.
It appears to be related the wheels/ suspension/ driveshaft.
It seems to come from the front nearside wheel.
It starts at about 10-15 mph and gets worse around 30 then lessens but still evident as i go faster.
It is in no way related to engine revs.
Can feel it in the floor pans and steering wheel but not in the gear stick.

I have tried changing the nearside front wheel for the full sized alloy spare but nothing changed. (so not a buckled wheel or tyre??)

Anyone any clues?

Just to add

Do they have balanced driveshafts like they did on the Rover Sterling?. My dad had an unballanced one and that is just what it feels like.
I also once had a buckled tyre. This is what it reminds me of.

Have you checked over you pass. and driver side axles? I know when my drivers side axle went it made a knocking noise. Look for a worn/torn axle boot and you might find the issue.

Noise probably came from wheel bearing.