Knowsley Council faces equal pay claims that could be worth tens of millions of pounds, GMB Union has said.
Thousands of workers in roles traditionally held by woman - including administration assistant and chef supervisor - may have been underpaid compared to work done by those in roles dominated by men.
GMB has begun launching claims on behalf of members to right this historic underpayment.
Michael Clark, GMB Senior Organiser, said:
“Knowsley Council needs to listen to our members and deal with their pay injustice
"More than fifty years after the equal pay act, it's a scandalous women are still paid less for doing work of equal value.
"We urge anyone working for Knowsley who thinks they may be affected to join GMB so we can help you claim what you're owed."
