Scotland's success in the Turner Prize, the leading contemporary art award, looks set to continue as the four artists short listed for this year's £25,000 award unveiled a film-dominated show in London.

At the award's exhibition, at Tate Britain, three of the four artists display video and film works.

Scotland looms large in the shortlist: Duncan Campbell and Ciara Phillips, who both still live and work in Glasgow, as well as fellow nominee Tris Vonna-Michell, all attended Glasgow School of Art.

Along with London-based artist James Richards, they unveiled their work for the 30th running of the prize.

This year's winner will be announced on Channel 4, on December 1, by award-winning actor Chiwetel Ejiofor.

Campbell, Vonna-Michell and Richards all present film works, with only Phillips offering a more traditional show, with a vivacious room of bright screen prints and installations.

Next year, the award show is being held at the Tramway in Glasgow, and the odds point to another Scottish-linked winner this year.

Since 1996, when Douglas Gordon won, six artists from, based or trained in Glasgow have won the prize.

Martin Creed won in 2001, Simon Starling in 2005, Richard Wright in 2009, Susan Philipsz in 2010 and Martin Boyce in 2011, with numerous other Scottish artists short listed.

Campbell, originally from Dublin, down played the competitive element of the prize yesterday, and said he was happy his work would be seen by many people.

He added: "Obviously it is a competition, but it is what it is.

"Because I know everyone in the show, it really does not feel adversarial in that way."

Ciara Phillips, a Canadian artist who works in Glasgow, said she viewed the Turner Prize as four strong shows at one exhibition, with the prize as a separate entity.

Penelope Curtis, the director of Tate Britain and chair of the prize, said: "There has been a lot of film work in the art world for the last ten or 15 years, and it happens that this year that is what the jury has admired.

Ms Curtis said that Glasgow School of Art and the city's relatively low rents for studios and accommodation still make it very attractive for artists.

She added: "Glasgow is cheaper to live in than London. That makes a material difference to artists, and I think it has always been a supportive community.

"If a new artist arrives there, there are always other artists to talk to."

In the exhibition, Richards shows Rosebud 2013, which features filmed censored photographs from Tokyo library books, as well as The Screens 2013, which features projected images from a theatrical make-up manual, and Untitled Merchandise (Lovers and Dealers) 2007.

Vonna-Michell shows Postscript II (Berlin) 2014, a slide installation based on his mother's childhood in post-war Germany.

Vonna-Michell also shows his first film installation, Finding Chopin: Dans l'Essex 2014, which revolves around French sound poet Henri Chopin (1922-2008) and his own performance art.

Phillips presents a new installation, Things Shared 2014; colourful handmade screenprints pasted straight onto the gallery walls from floor to ceiling. A giant 3D 'OK' is also in the room. Campbell shows It for Others 2013, which responds to a 1953 film essay about historical African art and colonialism.