Manderley, I was also thinking of that poor woman and agree, that's one of the most egregious examples of 'getting ahead of the law' and removing single-sex options for women entirely.
I guess her council followed Stonewall guidance that advised removal of single-sex exceptions, in spite of that specific case being used as an example (as MPs are not actually that evil as to force rape survivors to describe their experiences in male presence in therapy). Stonewall campaigned and failed to remove the exceptions, but went ahead and advised everyone for years 'to get ahead of the law'. Now that's being challenged.
However, I look forward to Stonewall defending their power- drunk, puritanical zealotry at the end of the month in Allison Bailey case, ably assisted by our esteemed visitor, on camera. I'm sure we'll all be smitten by the argument, and promptly recant.
As to Sarah, I do believe she should contact EHRC for advice and guidance, as I doubt her council is compliant with the new non-statutory guidelines, but would totally understand if she didn't want to pursue the case, she's had quite enough to deal with 
I would rather the test case was something less horrific for the claimant, and unfortunately am sure there will be further cases coming up, as some males seem to insist on using our spaces EVEN when mixed-sex options are available AND we tell them it's fucking terrifying for us, because their feelings are more important than ours. 