A picture paints a thousand words...
I wonder if the BBC is hedging to see how people react to reading an article with a very obviously male perpetrator. Previously, similar stories have run with the (male) perpetrator wearing a wig to show that they identify as a woman. I assume that the photo choice for the article included these options too.
As per usual with BBC reporting, she/her pronouns are used. But on this occasion, this practice has been restricted to quoted words from the defendant's legal team.
Perhaps a subtle shift in reporting style?