Borrowers could collectively save £2.5 billion in six months if they took advantage of the most competitive credit card deals on the market.

But despite some providers offering introductory interest rates of zero per cent for the first six months, the majority of consumers are too apathetic to make the most of the deals, according to PricewaterhouseCoopers.

While consumers had an average of £1,400 outstanding on their credit cards at the end of last year, only five per cent of people said they would consider changing provider to get a lower interest rate.