Lloyds Banking Group and Santander have come at the top of a list ranking the UK banks with the highest number of customer complaints.
Lloyds received almost 290,000 complaints in the first six months of this year, followed by Barclays and Santander, which contended with just over 240,000 customer gripes, according to the report by the Financial Services Authority.
A spokeswoman from Lloyds said: "Our relationship with our customers is at the heart of our business and we take all feedback very seriously. Like every organisation we know there are areas where we can improve and we are working with our customers to do just that. The vast majority are happy with the service we provide and this is reflected in the low number of complaints we receive relative to the high number of accounts our customers hold".