The private bank has reiterated that it has no tolerance for workplace discrimination. It won a tribunal case this week brought by an employee.

Coutts, the UK private bank that won an employment case this week against a female executive who had accused it of sexist behaviour, said it did not tolerate workplace discrimination.

The London tribunal dismissed all claims brought against the bank by Donna Ball, an associate director at Coutts.

"We do not tolerate discrimination within the workplace and are committed to ensuring a continued focus on our conduct and culture, encouraging all employees to speak up where they experience or encounter any behaviour that falls below our standards," a spokesperson said in an emailed statement this week.

"We have a bank-wide training module on sexual discrimination and harassment in the workplace which all staff are required to take annually. Separately, over the last two years all staff have been required to undertake unconscious bias training," the spokesperson added.

In the lawsuit, Ball had reportedly claimed that an “unspoken sexism” at Coutts prevents women from speaking up when they are denied promotions and that men are not properly disciplined for sexual harassment. She described “glass ceilings” and lower pay for women in her filings for the case.

Ball began working for Coutts as an associate director in December 2010, working as a relationship manager. Reports said she had a starting salary of £53,000 pounds ($69,000) and an overall package worth £68,900.