Back story: DH put in grievance against line manager for a serious of bullying and harassment. DH works in a large company complete with a fully staffed HR.
The hearing was held in December 2018, and some of the charges against DH's line manager were upheld, but nothing really changed to happened.
DH now found out that he is being summoned as his line manager has lodged a grievance against him
saying that DH's grievance was malicious and vexatious.
He has an outstanding union rep, but cannot understand how a line manager can raise a grievance about a grievance?
Any advice?