Steel UC section dimensions follow old British Standard (1971)

[MSRChurch]

As best I can tell the section dimensions in Create Profile -> Catalogue/British/Universal columns(UC) - EN10365:2017 follow the old british standard BS 4-1:1971 even though the section properties match the modern standard BS 4-1:2005 / EN10365:2017.

Create Profile -> Catalogue/British Steel/Universal columns(UC) seem to follow the modern standard. I haven't check all UC and UBs in these catalogues though.