Phil Hammond Doctor, writer, broadcaster and comedian. Medical correspondent for Private Eye. Has toured the UK with his hit show 89 Minutes to Save the NHS, and co-written a BBC sitcom, Doctors and Nurses. A regular on The News Quiz and Have I Got News For You.

Johann Hari Columnist for The Independent. Youngest ever nominee for the Orwell Prize for political writing (2005). Has written a play, God Save the Queen, and a novel, Going Down in History.

Harriet Harmen Solicitor and Labour MP for Camberwell and Peckham since 1997, having previously been an MP for Peckham since 1982. Was appointed Minister of State at the Department for Constitutional Affairs in May 2005.

Julia Hartley-Brewer Political editor of the Sunday Express and regularly appears on TV and radio shows including Have I Got News For You, Question Time and Channel 4's Richard and Judy.

Roy Hattersley Former deputy leader of the Labour Party, also one of Britain’s most prolific writers. Author of both fiction and non-fiction, has also written for nearly all the newspapers in the country. Was MP for Birmingham Sparkbrook for 33 years.

Tony Hawks TV and radio comedian and bestselling author. Author of Round Ireland with a Fridge, Playing the Moldovians At Tennis and One Hit Wonderland. A regular on I'm Sorry I Haven't A Clue, Just a Minute and Have I Got News For You.

Natalie Haynes Perrier Award-nominated comedian with an IQ of 155, which places her in the top 1 per cent of the population. Has been described by Julie Burchill as the most exciting thing since Morrissey.

Richard Herring From comedy duo Lee and Herring, has written and performed on radio shows Lionel Nimrod's Inexplicable World and Fist of Fun. One-man shows include Richard Herring Is Fat and Talking Cock. With Al Murray, devised and wrote the sitcom Time Gentlemen Please.

Isabel Hilton Expert in Chinese affairs, editor of openDemocracy and a regular presenter on Radio 3's Night Waves. Contributes extensively to BBC World Service and BBC Television Current Affairs.

Phil Hilton Editor of men's weekly magazine Nuts. Started reporting for the computer trade press before editing and launching a string of men's magazines including FHM and Later. Won Launch Editor of the Year in both 2003 and 2004.

Peter Hitchens After 24 years as a reporter on the Daily Express, Hitchens is now a Mail on Sunday columnist. A former Trotskyist and member of the Labour Party, he now describes himself as a cultural and moral conservative.

Shere Hite Sex educator and feminist. Her sexological work has focused primarily on female sexuality. Builds upon biological studies of sex by Masters and Johnson, Kinsey. Also references theoretical, political and psychological works associated with the feminist movement of the 1970s, such as Anne Koedt's The Myth of the Vaginal Orgasm.

Julia Hobsbawm PR guru. London's first professor of public relations. Was a partner in Hobsbawm Macaulay Communications. Last year set up Editorial Intelligence. Currently editing a collection of essays on truth and the media for publication this year.

Margaret Hodge MP Minister of State for Industry and the Regions at the Department for Trade and Industry, Former Labour leader of Islington Council and one of Tony Blair's closest allies.

Kate Hoey MP Labour MP for Vauxhall since 1989 and former Sports Minister. Fought against the Labour Government's plans to ban fox hunting in the UK. Chairman of the Countryside Alliance and campaigned against London's candidacy for the 2012 Olympics.

Michael Holden Journalist who writes about arts and media for the Guardian, The Independent, Arena Homme Plus and Q Magazine. A regular on TV and radio including London’s LBC radio.

Dr Rosemary Hollis Director of Research at Chatham House in London, specialising in foreign policy and security issues in the Middle East, and particularly European, EU, UK and US relations with the region.

Rachel Holmes After leaving Amazon.co.uk, wrote her first book, Scanty Particulars, a biography of Dr James Barry. Has judged the Whitbread and Orange prizes, and is secretary of AHIV/Aids movement, Friends of TAC.

Bettany Hughes Has written and presented TV and radio programmes including Leviathan for BBC2, Wideworld for Channel 5, The South Bank Show for BBC1, and recently presented Helen of Troy on Channel 4.

Frieda Hughes Poet and painter. Has also written and illustrated children’s books. Daughter of Ted Hughes and Sylvia Plath, and is married to the Hungarian painter Laszlo Lukacs.

Marina Hyde Columnist for the Guardian, where she writes about politics, sport and the world of celebrities. She started her career in journalism as a secretary on the Sun's showbiz desk, and until recently she wrote the Guardian's Diary column.