In 2013, 38 million complaints were lodged against corporations in the UK, and here we'll get the inside story on some of the most stubborn complainers and the people dealing with their protests.
We'll go inside Transport for London in the first episode where an obsessive tweeter and a cyclist who deploys a strange array of tools to defend his position on the road are among those we'll learn about.
There's also a bus driver sent on a course known as the 'naughty boys club', and a call handler who's built a special relationship with a persistent customer.
The Complainers, C4, 9pm
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