The depiction of Mosley is a little too SJW for me. He certainly had policies that favored England, and wanted to isolate it from what he (probably rightly) saw happening with international politics and industry.
For anyone interested, a reasonably correct (and short) article is here: https://slate.com/news-and-politics/2017/04/why-the-british-union-fascist-movement-appealed-to-so-many-women.html
His version of fascism was actually a lot more civilized, and very little of the anti-zionist stuff that was so prominent in the European parties.
As always, there is the popular depiction, and then there is reality ... sometimes, they agree. In part.
As a side note - I ended up living in the next village along from the place where he moved to and died (Orsay, France).