Thousands of consumers could be entitled to large compensation payments after being sold interest-only mortgages.
Mortgage mis-selling claims are expected to rank alongside the PPI payout, with potentially billions due to customers who were wrongly advised to take out interest-only mortgages, leaving them with no way to pay back the loan when it becomes due.
Of the 2.6m interest-only mortgages due to be repaid by 2041 some 600,000 will mature by 2020.
Unlike PPI, which cost banks £50bn, mortgage mis-selling could land at the doors of brokers, as they were made responsible for advice to customers in 2004.
