Miss Thorp has set up a petition to the government stating that the law is ‘outdated and sexist’. She has received much support.
UK employers have a wide discretion on the dress policy for their business. This can differentiate between different types of employee, for example a smarter appearance can be required for those in a customer facing role. There can also be a different policy for male and female employees , provided that it is reasonable and there is a requirement for an equivalent level of smartness.
It is always advisable for any dress code to be incorporated into the office manual so that the requirements are clear and available to all employees.