They’re the men behind the biggest class action in the country, and they have the big four banks in their sights.

James Middleweek is the boss of Perth firm Financial Redress, a legal service that specialises in recovering unfair bank and credit-card charges.

Taking on the big banks ... James Middleweek and Hugh McLernon.

BusinessDay today reported that the big banks face the biggest class action in Australian corporate history for overcharging their millions of customers about $5 billion in penalty and late fees over the past six years.

Financial Redress was formed in 2009 and is a subsidiary of litigation funders IMF Australia.