a study found women routinely ask for £ 4,000 less for a typical job .
this widens to up to £ 10,000 less in more senior industries such as accountancy .
on average , women ask for almost a fifth less than men , rising to nearly a third less in some financial sectors .
not only do they ask for less than their male colleagues , but they are also asking for below what they could typically expect to earn in their industry .