High heels are on display in a store in London, Monday March 6, 2017. British lawmakers are due to debate banning mandatory high heels in the workplace on Monday, in response to a petition started by a receptionist who was sent home for wearing flat shoes. The debate is non-binding, but a committee of lawmakers has found that "discriminatory dress codes" are commonplace and called for urgent action. (AP Photo/Tim Ireland)
High heels are on display in a store in London, Monday March 6, 2017. British lawmakers are due to debate banning mandatory high heels in the workplace on Monday, in response to a petition started by a receptionist who was sent home for wearing flat shoes. The debate is non-binding, but a committee of lawmakers has found that "discriminatory dress codes" are commonplace and called for urgent action. (AP Photo/Tim Ireland) Credit: Tim Ireland

In a debate that has gone from office corridors to Britain’s Parliament, lawmakers put their foot down Monday and told employers to stop making women wear high heels as part of corporate dress codes.

Members of Parliament debated a ban on mandatory workplace high heels, in response to a petition started by a receptionist who was sent home without pay for wearing flat shoes. The debate was nonbinding, but the government promised to act against heel-height rules, makeup guidelines and other corporate codes that apply to women but not to men.

Labour lawmaker Helen Jones, who helped lead a parliamentary investigation into dress codes, said she and her colleagues were shocked by what they found.

“We found attitudes that belonged more – I was going to say in the 1950s, but probably the 1850s would be more accurate – than in the 21st century,” she told lawmakers at Parliament’s Westminster Hall.

Monday’s debate was triggered by the experience of Nicola Thorp, who was told in December 2015 that her smart flat shoes were unacceptable for a temporary assignment in London with finance firm PwC.

Her employment agency, Portico, had a dress code specifying that female workers must wear non-opaque tights, have hair with “no visible roots,” wear “regularly re-applied” makeup – and appear in shoes with a heel between 2 and 4 inches high.

For Thorp, that was a step too far.

She started an online petition, calling formal workplace dress codes “outdated and sexist.” It has gathered more than 150,000 signatures, making it eligible for a debate in Parliament.

Thorp’s petition has already caused one change. Portico announced last year it was amending its policy to adopt a gender-neutral dress code and to allow workers to wear flat shoes if they prefer.

Britain’s Conservative government said it was listening. Women and equalities minister Caroline Dinenage told lawmakers that the U.K. had “strong laws to tackle sex discrimination at work, and this includes dress codes.”

“Shod in heels or flats, we are collectively putting our foot down,” she promised.