(The update was done as https://www.openstreetmap.org/changeset/169808418, for reference)

Thanks, both of you, for looking at this. I believe there’s another sign about the restriction at the Caspian Way/Ashton Road mini-roundabout, which would mean that the entire section which IvaKraljić tagged should be tagged with some kind of maxweight tags, I believe. Not just the section nearest the A6 crossroads.

I suspect the weight restriction is for the benefit of the Piccadilly Lane and Ashford Road bridges.