A combination of British pop royalty, rowdy rock acts and recently re-formed pop groups took home the major prizes at the annual Q Awards ceremony, organized by the U.K.-based monthly music magazine.

Held today (Oct. 25) at London's Grosvenor House Hotel, British alt-rock act Kasabian won the title of best act in the world today, beating Arcade Fire, Muse, Kings of Leon and Green Day to the prize. The band's third studio set "West Ryder Pauper Lunatic Asylum" (Columbia/Sony) was named best album at last year's ceremony.

Paul McCartney, meanwhile, made a surprise appearance at this year's event to collect the classic album award for Wings' 1973 record "Band On The Run."

Accepting the award, which he dedicated to his late wife Linda, McCartney told guests: "To all the young bands out there...which is pretty much everyone...keep rocking! I love you."

The event also marked the first public outing for all five members of U.K. pop group Take That since Robbie Williams rejoined the band earlier this year. The reformed former boy band, who are expected to announce 2011 tour dates at a press launch in London tomorrow morning, were inducted into the Q hall of fame at the awards ceremony with Williams telling guests that he was "very happy to be back -- first day and we've won an award."

Take That's comeback studio album "Progress" (Polydor) is released Nov. 22 in the U.K. and is widely expected to be one of the year's biggest sellers.

Florence Welch, of Universal/Island act Florence and the Machine, was also in attendance to collect awards for best female and best song for her cover of "You've Got The Love" by The Source featuring Candi Staton.

Other big winners included alt-folk band Mumford and Sons, who won best new act, Paolo Nutini, who took home best male and U.K. urban/soul star Plan B who beat Ellie Goulding and Laura Marling, among others, to win the title of breakthrough artist.

Despite multiple nominations for Arcade Fire and Lady Gaga, Green Day were one of only two U.S. acts to leave with an award, taking home the prize for best live act.

New York City-based band the National, however, sprang one of the event's genuine shocks by landing the best album award for their acclaimed studio set "High Violet" (4AD), beating Arcade Fire's "The Suburbs" (Merge) and Gorillaz' third album "Plastic Beach" (EMI).

"To be up against those awesome records was an honor and we are thrilled and thankful," vocalist Matt Berninger told Billboard.biz at the awards bash. "Mostly we are excited to make fun of Arcade Fire when we see them and we're going to mount this to our tour bus and park right in front of them."

Other awards given out at the ceremony, which was attended by the Kinks' Ray Davies, Duran Duran's Nick Rhodes, Duffy, 1960s vocalist Sandie Shaw, U.K. rapper Tinie Tempah and KT Tunstall, among others, included icon awards for Bryan Ferry and Madness, while re-formed U.K. Britpop band Suede received the inspiration award.

The full list of winners is:

Breakthrough Artist - Plan B
Best New Act - Mumford & Sons
Hall of Fame - Take That
Best Track - Florence And The Machine, "You've Got The Love" (Universal Island)
Classic Songwriter - Neil Finn
Inspiration - Suede
Best Live Act - Green Day
Best Video - Chase & Status, "End Credits" featuring Plan B
Next Big Thing - Clare MaGuire
Idol - Madness
Hero - The Chemical Brothers
Best Male - Paolo Nutini
Best Female - Florence Welch
Innovation in Sound - Mark Ronson
Best Album - The National, "High Violet" (4AD)
Best Act In The World Today - Kasabian
Icon - Bryan Ferry
Classic Album - "Band On The Run," Wings