Quite right, Grammarnut. The Supreme Court ruling was very clear (as indeed is the Equality Act itself). I'd recommend TeiTetua and others who think there is room for dispute to read the judgement.
As for Esther Freud, she seems to be yet another posh white woman who thinks she has the right to lecture other, less privileged, women to "be kind". I really think that kind of woman is simply used to having her way, and hasn't understood that the law is categorical. Does she understand that she is encouraging people to break the law? Or does she think perhaps the law doesn't apply to people she likes?