No, the employee has just gone outside of work to a solicitor. The solicitor has now sent a letter to the supervisor and the employer has taken the position that it's nothing to do with them (the employer)
As far as I know the letter threatens proceedings against the supervisor personally and has requested a response to the allegations made by the employee as stated in the solicitors letter.
The employee has NOT made a complaint to the employer BUT has gone straight to a solictor it is the supervisor who went to the employer and asked for support and was turned down.
discrimination on race and age
The employee making allegations solicitor has requested a response to those allegations, the employer has advised the supervisor to get their own solicitor and left them to it.