David Cameron will attend the secretive Bilderberg Group meeting in Watford this evening, Downing Street has confirmed.

SEE ALSO: Conspiracy Theorists Or Concerned Citizens?

However his visit to the shadowy private conference of top politicians and businesspeople is classed as "private" so details of who he meets and what is said will not be made public.

SEE ALSO: Cameron's Attendance At Bilderberg Group Is 'Conflict Of Interest'

Despite this, No.10 insisted on Friday morning: "The prime minister has always believed in importance of transparency."

A Downing Street spokesman said: "My understanding is that it is usual for Bilderberg to invite the head of government of the country where it is meeting.

"He will participate in a discussion around domestic and global economic issues. He feels it is an opportunity to discuss economic issues with senior ministers, businesspeople and academics."

Billionaire executives, top politicians and royals arrived in suitably secretive style yesterday for the controversial private conference labelled a "sinister meeting of puppet masters"

Luxury cars with blacked-out windows rolled through the gates of the five star Grove Hotel, near Watford, in Hertfordshire for the four-day meeting.

It is thought billionaire executives from multinational companies such as Amazon and Google, high-ranking political figures including George Osborne, and even members of royal families are among the 130 or so attendees.

Amid tight security, members of the press and more than 100 protesters gathered in a fenced-off area just inside the grounds of the hotel, but about half a mile from the redbrick hotel.

Labour MP Michael Meacher spoke out against the conference to the press and protesters and called the delegates the "real top brass of Western finance capitalism".

"These are people who are all in the most dominant positions in the governance of Western capitalism," he said.

"They only meet in order to concert their plans about the future of capitalism over the immediate future period - the next year or two. My objection is that it's being done in utter secrecy with the police keeping everyone else out."

Related on HuffPost:

Loading Slideshow...
  • The Bilderberg Group summit - Watford

    Judd Charlton and his dummy protest at the Grove Hotel, in Watford during the the Bilderberg Group summit meeting attended by , politicians, billionaire investors, banking and corporate CEOs, plus policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    American radio host, author, conspiracy theorist and documentary filmmaker Alex Jones, speaks to the media outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    American radio host, author, conspiracy theorist and documentary filmmaker Alex Jones, speaks to the media outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    American radio host, author, conspiracy theorist and documentary filmmaker Alex Jones, speaks to the media outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    American radio host, author, conspiracy theorist and documentary filmmaker Alex Jones, speaks to the media outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    American radio host, author, conspiracy theorist and documentary filmmaker Alex Jones, speaks to the media outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    A protestor outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    Police stand in a closed road near to the Grove Hotel, in Watford prior to the The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    Labour MP Michael Meacher speaks to the media outside the Grove Hotel, in Watford prior to The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    A protestor outside the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    A view of the Grove Hotel, in Watford where The Bilderberg Group summit meeting is being held, attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    Labour MP Michael Meacher speaks to the media outside the Grove Hotel, in Watford prior to The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    A car arrives at the Grove Hotel, in Watford during the The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, plus policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    Security personnel search people as they arrive at the Grove Hotel, in Watford prior to the The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group summit - Watford

    Police patrol the grounds of the Grove Hotel, in Watford prior to the The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A man views The Grove hotel which is hosting the annual Bilderberg conference from the designated protest and media zone on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group summit - Watford

    A car arrives at the Grove Hotel, in Watford prior to the The Bilderberg Group summit meeting attended by royalty, politicians, billionaire investors, banking and corporate CEOs, policy-makers and media moguls from all over the world.

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers stand guard on the roads surrounding The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers watch a man carrying a guitar make his way to the designated protest and media zone near The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers check vehicles on the roads surrounding The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A police helicopter flies above The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Protester Steve Jolly, from the organisation 'No CCTV', wears a cardboard replica of a CCTV camera on his head in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Alex Jones, an American radio host, author and conspiracy theorist, addresses media and protesters in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A poster adorns the security barrier of the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Demonstrators gesture from the protester encampment as vehicles arrive at The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A man views The Grove hotel, which is hosting the annual Bilderberg conference, from the designated protest and media zone on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Alex Jones (C), an American radio host, author and conspiracy theorist, addresses media and protesters in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers patrol the grounds of The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A man looks through postcards with various protest themes in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Alex Jones (C), an American radio host, author and conspiracy theorist, addresses media and protesters in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Demonstrators in the protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers patrol the grounds of The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers stand guard on the roads surrounding The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A security fence surrounds The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A man views The Grove hotel which is hosting the annual Bilderberg conference, from the designated protest and media zone on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A woman uses her laptop computer next to a protester encampment outside The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A security fence surrounds The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: Police officers stand guard on the roads surrounding The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A security fence surrounds The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A man demonstrates against 'Chemtrails' in a protester encampment outside The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A security fence surrounds The Grove hotel which is hosting the annual Bilderberg conference on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: An electronic sign instructs people to remain behind the barriers of the designated protest and media zone near The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, businessman and European royalty. (Photo by Oli Scarff/Getty Images)

  • The Bilderberg Group Arrive In Watford

    WATFORD, ENGLAND - JUNE 06: A vehicle with tinted windows passes mounted police officers as it enters the grounds of The Grove hotel, which is hosting the annual Bilderberg conference, on June 6, 2013 in Watford, England. The traditionally secretive conference, which has taken place since 1954, is expected to be attended by politicians, bank bosses, billionaires, chief executives and European royalty. (Photo by Oli Scarff/Getty Images)