Hi, Sorry to say that you've duplicated several sections of highways placing a highway directly on top of another highway. The duplication will probably disrupt routing. I would normally correct these but there are a lot of relations involved which are mixed between the duplicated highways. So, it will take some time to study and sort out the relationships. The duplications are to be seen here:- https://tools.geofabrik.de/osmi/?view=routing&lon=-1.08743&lat=53.50308&zoom=13&baselayer=Geofabrik%20Standard&overlays=duplicated_edges%2Cduplicated_edges%2Cduplicated_edges_areas

If you need help please ask, I'll see what I can do.

Regards Bernard.