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There are approximately 15 dedicated quiz channels on UK digital TV.

ITV Play is ITV's first ever channel without commercials - revenue comes from viewers' calls and text messages.

The network believes this channel will generate a £20 million profit in its first year.

According to The Times, Quizmania earned ITV over £1.2million during its first two weeks of transmission on ITV1.

Quiz channels are estimated to generate around 20,000 calls each day.

With an average call costing at-least 60p per minute, this theoretically generates a bare minimum of £12,000 a day.