Just 27 per cent of people said they read the documents in full but only 17 per cent said they fully understood them.

As part of its transparency ratings, consumer group Fairer Finance counted the number of words in the Ts & Cs and policy documents of all the major banks and insurers.

Of the UK’s largest banks, HSBC topped the table with Ts & Cs for its current account coming in at just over 34,000 words – almost 5,000 words longer than John Steinbeck’s Of Mice and Men.

Norwich & Peterborough Building Society, Metro Bank, Natwest and Halifax also all came in at more than 25,000 words – over twice the length of Nationwide’s bank account terms and conditions, the shortest in the sector at just over 11,000 words.

In the car insurance space, Endsleigh, Sheila’s Wheels, Esure and M&S Bank all have policy documents of over 30,000 words – longer than George Orwell’s Animal Farm.

At 37,676 words, Endsleigh’s is the longest in the sector, and is just a few hundred words shy of Joseph Conrad’s Heart of Darkness. They are put to shame by LV, who do the same job in 6,901 words.

James Daley, founder and managing director of Fairer Finance, said: “If next to no one is reading terms and conditions, and even those who do are struggling to understand them, then what exactly is the point of these documents? Of course it’s important that customers know what’s covered and what isn’t in their insurance policy, but if one company can do the job in less than 7,000 words, there’s no excuse for insurers who are producing documents that are five times as long.

“As a first step, we want all banks and insurers to take the legalese and jargon out of their small print, and to lay out the documents in a way that’s accessible and doesn’t turn off customers before they’ve started. But in the long-run, the industry needs to have a rethink about what information it needs to get across to its customers, and what’s the best way to do that. Too often, compliance managers and lawyers talk banks and insurers into throwing the kitchen sink into these documents, which reduces the chance of the small print ever being read.

“We’re encouraged to see that the Financial Conduct Authority recently cited terms and conditions as an area of potential detriment for consumers. Let’s hope that it’s up to the challenge of solving this problem and getting banks and insurers to be more transparent.”