Steve Tatlow, assistant general secretary at Lloyds TSB Group Union, said: "The survey confirms what we have known all along. That staff dealing with customers day in and day out are having to deal with considerable customer hostility at having their accounts handled abroad.

"The results show that whatever Lloyds TSB might say about the customer service provided by its India operation, hordes of customers are complaining across the UK each and every day of the week.

"Senior Management will have to make a choice. Either to continue with cost cutting in the teeth of customer opposition to its offshoring plans, or else refocus its strategy towards putting customers first."