The tribunal agreed.
Leher also won claims of race and age discrimination and unfair dismissal.
Leher, who is of mixed black African heritage, said younger colleagues, none of whom were black or mixed race, were promoted ahead of her.
She put her hand up for training, but all her requests for higher roles were rejected or ignored.
Then, after returning from stress leave, Leher she was "shunned" by her colleagues when they discussed party plans in front of her without inviting her.
"We all conclude that this exclusion was because she had complained of discrimination," Moor said.
"While working relationships were relatively amicable, the team did not wish to socialise with someone who had complained of discrimination.
"This was a way to make their displeasure over the complaint felt."