Flowery I will “explicitly state” that unless a dress code is discriminatory, an employer can absolutely tell someone how to dress. Up to you if you believe me or not, but I would caution you not to assume anyone saying an employer “can’t” do something actually knows what on earth they are talking about...
I’m still eagerly awaiting someone to educate me on the legal basis for saying an employer can’t impose a (non discriminatory) dress code, by the way.....
Jesus Christ. Flowery - I do have a job! Heres your free education, which you (a) won't understand and (b) could have looked up yourself.
Any dress code must form part of the employee's terms and conditions of employment. The t&cs cannot be changed unilaterally, they must be agreed with the employee.
Any dress code must be justifiable, legal, reasonable and non-discriminatory. There must be a legitimate aim to it and it must be and the dress code requirement must be necessary to achieve that aim. I don't see how an employer could prove, on the balance of probabilities, that the wearing of a Hobbs dress or a skirt and top (as long as decent) transgressed a reasonable dress code for a legitimate aim.
Dress codes for men and women don't have to be the same but they must be equivalent.
So an employer would have to be fairly scrupulous in being able to prove that the requirement was a reasonable requirement of the workplace and not directly or indirectly discriminatory on grounds of e.g. sex or religion, and also not a breach of Article 10 of the ECHR - freedom of expression.
Employers cannot go around dictating what women wear because they do not like their choice of reasonable clothing. The requirement must appear in the dress code so as to form part of the contract of employment and even then, it must be a reasonable, non-discriminatory requirement. People may choose to dress in a similar way in a workplace which does not have a dress code, but this is not reasonably enforceable.
The unilateral comments towards the OP are so potentially indirectly discriminatory on grounds of sex that the employer is treading very dangerous territory. The choice of clothing is clearly suitable for the given workplace and its difficult to think how the employer could justify such objective, appearance based comments to a female employee.
Furthermore, if there is no male equivalent to the requirement, it will likely be discrimination. So for instance, if some of the OP's male colleagues wear trousers that are not jeans but are reasonably smart, this would be unlawful discrimination against the OP.
It is very difficult for an employer to justify objective value judgements such as the perceived smartness of suitable workplace clothing without being potentially discriminatory.
Picking on female employees for wearing day dresses, skirts and blouses is discriminatory because it leaves them with little alternative clothing other than trousers, and if female employees are required to wear trousers, this must be stated in the dress code (however unless justifiable) that would be discriminatory. And that isn't what has happened here. The OP has not contravened her employer's dress code and has had an arbitrary value judgment as to her appearance imposed upon her. It smells very much of gender bias.
The legal basis is therefore the relevant provisions in the Equality Act 2010, Article 10 ECHR and all relevant case law.
FWIW Flowery you are approaching this from the wrong angle. It is not up to the OP to prove the employer's comments to her wrong, it is up to the employer to justify them in law. If the OP then were to suffer a detriment in her employment as a result of this arbitrary requirement, that would constitute unlawful victimisation under the Equality Act. You are also confusing the law not being applied correctly with the law itself.