A City analyst who claimed she suffered sexual discrimination at the hands of her former employers has won an appeal to have the case heard by an employment tribunal.
Louise Barton, a media analyst at Investec Henderson Crosthwaite Securities, claimed she was paid only half the £2m given to a male colleague for the same work - even though he was her junior.
But after an earlier hearing where her case was rejected, an appeal was lodged with the Employment Appeals Tribunal.
Her spokeswoman said: "The appeals tribunal has ruled in Louise's favour and the case will go back to the employment tribunal for a new hearing."
The Equal Opportunities Commission said it would give moral and financial support to the City worker, who has incurred at least £120,000 in legal fees.
Julie Mellor, chair of the Equal Opportunities Commission, which has supported Barton said there was a culture of secrecy shrouding City pay.
"Women won't get equal pay until the culture of secrecy that surrounds pay is laid to rest," she said.