Flu fails to stop Foals performing
Foals frontman Yannis Philippakis has fought off the flu to open this year's Mercury Prize.
The London band are one of the 12 acts shortlisted for the prestigious £20,000 prize.
Yannis said there was "no pressure" in opening the show. He said: "It's nice just to get it done so we can enjoy the night."
Asked what he would do if he won, he joked: "I'd be tempted to see if we could try and spend it all tonight."
Other acts performing at the Roundhouse include soul singer Laura Mvula who is favourite to win the prize ahead of chart veteran David Bowie and previous winners Arctic Monkeys.
Electronica act Jon Hopkins was previously nominated for the Mercury for his collaboration with King Creosote, called Diamond Mine, but this is his first time in his own right.
He said he had thought about what he would say if he won but added: "It's very difficult to write a speech that you know will probably never be made."
Bookmakers have made Birmingham-born Mvula 7/4 to win followed by electronic duo Disclosure, rockers Foals and Bowie who surprised fans by returning to music scene with his The Next Day album.
William Hill spokesman Rupert Adams said so many bets had come in for Mvula that her odds had tumbled from 16/1 just a few weeks ago.
He said: "This is the biggest price move - certainly of this millennium and it looks like it is industry people who have sparked this gamble. It will come as no great surprise if she wins tonight."
The 12-strong list for the event, formally known as the Barclaycard Mercury Prize, includes seven acts who have previously featured on the shortlist since the prize was launched in 1992.
Arctic Monkeys - who took the prize in 2006 - and singer-songwriter Laura Marling each make it on to the list for a third time, while Foals, James Blake and Villagers are among those who make their second appearance in the nominations list.
Marling and Bowie, who rarely plays live now, did not perform at the event at the Roundhouse in north London.
Instead, fans were shown a film of Marling performing and the video for Bowie's track Love Is Lost.
Once a prolific pace-setter, Bowie had withdrawn almost entirely from the public eye in recent years and had released no albums for a decade.
But without warning earlier this year, he suddenly released the single Where Are We Now? and announced his comeback album, which was warmly received by fans and critics, as were the accompanying videos.
There have been persistent rumours of ill-health for the New York-based British star, but these have been repeatedly denied by his representatives.
The list, which includes five debuts by the likes of 19-year-old Jake Bugg and Disclosure, was drawn from 220 albums submitted to the judging panel.
Bugg, who was second up on stage, performed Lightening Bolt.
The other first-timers are Mvula, Savages and Rudimental. Inclusion on the shortlist usually ensures an instant boost in sales for nominated artists, who hope to emulate last year's winner Alt-J who triumphed with debut An Awesome Wave.
Other winners over the years have included Elbow, Klaxons and two-time winner PJ Harvey.
The £20,000 prize is open to British and Irish acts and aims to reward the best album of the year. Chairman of the judging panel Simon Frith said: ''This year's Barclaycard Mercury Prize shortlist celebrates a fascinating year for British and Irish music, marked by a wonderful range of musical voices - urgent, reflective, upbeat and tender, acoustic and electronic, and all with something intriguing to say.''