Companies can still ask workers to wear high heels to work after the UK government rejected laws banning the dress code.
The government said existing legislation was “adequate” but it would issue guidelines to firms this summer.
The issue was debated in Parliament in March after Nicola Thorp, who was sent home for wearing flat shoes, set up a petition with more 152,000 signatures.
Miss Thorp said the decision to stop short of a law change was a “cop-out”.
She began her petition after being told to leave a temp job for refusing to wear a “2-4 inch heel”.
A government spokesperson said it was already against the law to discriminate on the grounds of gender – but that this could be made “clearer to employers”.