With Bob Geldof the latest celebrity to back the anti-euro No Campaign, BBC News Online rounds up some of the high profile signings on both sides of the debate.

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Key supporters of the pro-euro campaign are:

Celebrities

• Comedian Eddie Izzard
• Inspector Morse star Kevin Whately
• Liz Dawn, aka Vera Duckworth in Coronation Street
• Fawlty Towers star Prunella Scales
• Blackadder actor Tony Robinson

Business leaders

• Colin Marshall, chairman of British Airways
• Adair Turner, vice-chairman of Merrill Lynch (Europe)
• Richard Branson, founder of the Virgin empire
• Niall Fitzgerald, chairman of Unilever
• Clive Hollick, chief executive, United Business Media
• Peter Blackburn, chairman and chief executive of Nestle
• David Simon, former chief executive and chairman of BP

Politicians

• Prime Minister Tony Blair
• Liberal Democrat leader Charles Kennedy
• Michael Heseltine, former Conservative Deputy Prime Minister
• Ken Clarke, former Tory chancellor
• Sir Ken Jackson, joint general secretary of Amicus trade union
• Neil Kinnock, former Labour leader
• Leon Brittan, European Commissioner

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The anti-euro campaign's backing include:

Celebrities

• Comedian Harry Enfield
• Vic Reeves, comedy star
• Bob Geldof, pop star turned businessman and activist
• Musician Jools Holland
• Comedian Rik Mayall
• Celebrity chef Gordon Ramsay
• Novelist Tony Parsons

Business leaders

• David Lees, chairman of GKN and Tate and Lyle
• Sir Colin Chandler, chairman of Vickers Defence Systems
• Sir Martin Jacomb, former chairman of Prudential
• David Ross, chief executive of Carphone Warehouse
• Tim Martin, Chairman of JD Wetherspoon

Politicians

• David Owen, former SDP leader
• Conservative leader Iain Duncan Smith
• Labour MP Dianne Abbot
• Margaret Thatcher, former Tory Prime Minister
• Kate Hoey, Labour MP
• Caroline Lucas, Green Party MEP
• Former Labour minister Frank Field