She talks about being 17 and buying herself a suit in the mens department of shops, where "bemused middle aged men harrumphed into their tape measure". This would be in 2005, so the middle aged men would have been teenagers in the 80's, not the 50's.
Pushing the gender boundaries was at its height in the 80's what with the likes of Annie Lenox and Boy George. Women's trouser suits were everywhere. In 2005 gender non conformity was being talked about, Hayley Cropper was in Corry for goodness sake.
Of course it is quite possible that an individual sales assistant would find it strange that she wanted a man's suit for herself. But I doubt they would harrumph if they thought they could get a sale! It is also odd that she never comes across the helpful assistant she always gets the judgemental unhelpful and bigoted one one.
I know my experiences reflect being brought up in a big city, and Manchester in the 60's, 70's and 80's was particularly accepting of alternative lifestyles. But the way she writes about her experiences just don't ring true. They sound like someone telling a story, not recounting true life events. They all sound like she lived in a backwater in the 1950's.