From British TV's first female same-sex kiss before the watershed to the naughtiness injected into morning viewing with The Big Breakfast, not to mention Big Brother starting an era of reality TV, Channel 4 has always done things differently.

Launching 40 years ago with Richard Whiteley introducing the now long-running afternoon favourite Countdown, this was a commercially funded way to deliver to under-served audiences and break up the duopoly of ITV and the BBC.

Channel 4 was designed to be disruptive. In recent years, it has normalised different body types with full-frontal nudity in Naked Attraction, delivered 24 hours of programming featuring only black presenters, actors, writers and experts, and brought us the masterful (and now leading BAFTA-nominated) drama about the AIDs crisis, It's A Sin.

Currently owned by the government, it is in a unique position in that it receives its funding from advertising, not the taxpayer. The government has argued that the broadcaster's long-term future needs to be secured amid concerns for its survival in the streaming era, with Culture Secretary Nadine Dorries saying its ownership is holding it back.

After launching a public consultation into a potential change in July 2021, Ms Dorries has been working through 60,000 responses. On Monday, the broadcaster was informed of the decision to go ahead with the sale.

As a channel that has pushed boundaries, will a sale lead to it losing its edge? Many in the creative industry certainly think so. A petition calling on Boris Johnson to stop the privatisation garnered more than 40,000 signatures (and counting) in less than 24 hours.

What have critics of the move said?

Russell T Davies, the creator and writer of It's A Sin, has previously said privatising Channel 4 would be a "great crime" that would result in programmes like his hit series not being made. Nathaniel J Hall, one of the stars of the show, agrees, telling Sky News he is "hugely disappointed" by the move.

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"A programme like It's A Sin would struggle to get programmed on a privatised Channel 4," he said. "In fact, the production was turned down by a number of other channels. Channel 4 fosters diverse and engaging TV that reflects modern Britain and at the recent Royal Television Society Awards, Channel 4 productions swept the board.

"It's the gleaming gem in the UK's outstanding broadcast portfolio. Privatisation will be the death knell of its creativity and fierce independence."

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Like Hall, writer and director Edgar Wright (Baby Driver, Hot Fuzz and Shaun Of The Dead) was among those sharing the petition online, while The Thick Of It, Veep, and I'm Alan Partridge creator Armando Iannucci tweeted: "Why do they want to make the UK's great TV industry worse? Why? It makes no business, economic or even patriotic sense."

Comedy writer Neil Gibbons didn't hold back. "Getting pretty hard to avoid the conclusion they're actually just f****** thick", he wrote on Twitter.

And it is not just those in the creative industries criticising the decision, with Tory MP Sir Peter Bottomley saying it is "bad for the diversity of television, bad for viewers and bad for independent producers". Labour's shadow culture secretary Lucy Powell has described privatisation as akin to "cultural vandalism".

What do analysts say?

Claire Enders, of media and entertainment research service Enders Analysis, told Sky News you cannot compare Channel 4 with streamers such as Netflix.

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