Jane Shepherdson, the outgoing boss of Topshop, has dismissed as laughable any suggestion she left the fashion chain after a row over supermodel Kate Moss.
Ms Moss has been hired to design a range of Topshop clothes
It has been claimed that Topshop's hiring of Ms Moss caused problems.
Ms Shepherdson insisted she helped seal the deal as "nothing would happen in Topshop without me agreeing to it".
In her first interview since she quit her post, she told the Daily Telegraph she had decided to move on, adding: "You cannot do the same thing forever."
She also said she had not yet decided what to do when she leaves the chain.
However, while she did tell the newspaper she had had "lots" of job offers she did hint that she would not work for another retailer after 18 years at Topshop.
Press speculation about the reasons behind Ms Shepherdson's decision to resign as brand director of Topshop has been rife since she announced she was leaving the group last week.
Many reports claimed she was upset at boss Sir Philip Green's decision to take on the controversial model for a "design collaboration", with others suggesting Ms Shepherdson was angry she had not been consulted over the deal.
But Ms Shepherdson strongly denied the claims in the Telegraph saying they were "simply not true".
"I like Kate and find it embarrassing that people think I left over a row about a supermodel. It is a shame that people think I'm that trivial," she added.
Ms Shepherdson is credited with turning around the fashion group - one of the most profitable parts of Mr Green's Arcadia empire - which is expected top bring in profits of £100m this year.