The movie that changed the way people think about what’s on their dinner plate makes its TV debut tonight – Tuesday October 20.

The End of the Line film was being screened by More4 at 10.00pm and is the latest stage of its incredible journey.

Among its many other milestones is an unprecedented four week run in London’s West End, a screening at the Sundance Festival and dozens of special screenings at subsequent festivals.

There have also been special screenings for European royalty including Prince Albert of Monaco and the Queen of Spain.

It was on screen as the UK’s first online seafood restaurant guide www.fish2fork.com was launched this week with the backing of some VIP supporters.

Sarah Brown, the Prime Minister’s wife, said on Twitter: “The End of the Line, the brilliant, watchable film on fish is on More4 at 10.00pm tonight and sustainable fish restaurant guide www.fish2fork.com”.

There was a similar message from author, actor and green activist Stephen Fry, who urged his 870,000-strong army of followers to watch the film and to visit the website.

Fish2fork.com aims to rate restaurants not just on the usual criteria of how good their seafood is but perhaps, more importantly, on what impact its capture has on our oceans and marine life.

The online guide has been set up by the same team which turned Charles Clover’s book The End of the Line on over fishing into a hugely powerful film.

Visitors to the site will find information about seafood restaurants across the UK and will be encouraged to ask questions about the fish they are offered when they dine out.

They can then easily upload their own view of the restaurant’s commitment to sustainability onto the website and help give it a simple rating score - blue fish for good and red fish for bad – on a sliding scale.

For its launch the website has reviewed and rated more than 100 restaurants across the UK but is relying on diners to provide their own reviews and help the website grow into an authoritative reference guide.

Within hours of its launch the website was being contacted by fish lovers eager to get involved by nominating restaurants they want to see in the guide.

Fish restaurants were also quick to see the marketing possibilities of being featured on the site and had filled in the www.fish2fork.com questionnaire.