She was signed off work over stress and told the company's managing director Choong Sik Park that she was being harassed by Mr Yoo in August: "He said Mr Yoo was very angry that I had broken protocol by not bowing to him every morning when I get to work and I do not bow to him when I leave the office at night.

"I didn't want any opportunity for harassment to occur so I was avoiding Mr Yoo."

Mr Park revealed changes brought in by Mr Yoo in the workplace led to him asking "is he normal or is he mental?" after it was revealed Mrs McDonald and her manager had not come to an agreement over her job role amicably.

The tribunal heard Mr Yoo was told he needed to reduce his staff numbers and gave her position in the accounts department to her former subordinate June Turner in a presentation to the company's CEO.

The MD said Mrs McDonald had agreed to leave the accounts department but voiced concern over Mr Yoo announcing the changes to colleagues.

He said "in this situation I did think the timing was a little soon given the recent problems that had emerged between Mrs McDonald and Mr Yoo.