Slash thinks rock 'n' roll can save British politics.

The former GUNS N' ROSES star previewed his new album 'World On Fire' at London's Houses Of Parliament and MPs rocked out to an acoustic performance, featuring 'Sweet Child O' Mine', which the guitarist described as ''surreal''.

He told the Daily Star newspaper: ''I'm a believer that this brand of rock 'n' roll should be about elevating the stress and worry of politics.

'''World On Fire' is a metaphor for a lot of different things - one of them being the current state of global affairs.''

The 48-year-old musician has worked with singer Myles Kennedy, 44, on the new collection - which will be released on October 13 - before the pair join The Conspirators on their biggest arena tour so far in November and December.

Talking about the new album, Myles said: ''There are a lot of different peaks, plus old school elements with the riffs too.''

Slash, who is now tee-total and doesn't smoke after years of excess, insists the musicians still like to ''play hard and just be a band'', adding: ''We still roll pretty hard.''

When asked about Miley Cyrus's partying antics recently, he also said: ''She's irritating. Our excesses are performing five or six nights a week.''

Meanwhile, Slash is also unsure if Metallica are the right band to headline Glastonbury along with Arcade Fire and Kasabian this year.

He said: ''When Metallica comes in you can't have them come on after Katy Perry.''

The star also addressed speculation he could be due to rejoin Guns N' Roses after Duff Mckagan, 50, was reunited with the band for a number of shows last year, saying: ''It isn't that big a deal.''