Women 'told to wear sheer blouses' as part of a uniform
Nicola Thorp was sent home from work for refusing to wear high heels.
She told the BBC: "It made me realise that actually my employer didn't want me to just look smart and professional, they wanted me to look attractive."
Scarlet Harris from the Trades Union Congress (TUC) said employers needed to "get over it".
MPs said on Wednesday the government must enforce the law properly to ban sexist dress rules at work that discriminate against women.