Not quite so.
Although he won a sex discrimination case, it does not change the rules for the rest of the country.
He still has to wear a tie, but his employers have had to review it.
The law has not changed & if your contract says you wear a tie, you still do.
Unfortunately..
Unless of course you can prove different & then I would be most interested. If you have some legal acts etc that say I can remove my tie then I'd be only too happy to show the personell dept at work