Anti-racism campaigners are handing over a petition to the Government calling for the leader of a far-right Hungarian political party to be banned from entering the UK.

Gabor Vona, leader of the Jobbik Party, which is accused of holding strong anti-semitic views and fuelling hatred against Jewish and Roma communities, is due to stage a political rally on Sunday in central London.

Mr Vona, founder of the now-outlawed Magyar Garda Mozgalom paramilitary guard, is set to speak to ex-patriots at the event, scheduled to take place a day before Holocaust Memorial Day.

Campaigners Hope Not Hate are handing in a petition to the Home Office calling on Home Secretary Theresa May to exclude Mr Vona from the UK.

Mr Vona and his party are said to have close links with groups such as the neo-Nazi Golden Dawn party in Greece and the far-right British National Party (BNP) led by Nick Griffin.

Addressed to the Home Secretary, the petition states: "As a supporter of Hope Not Hate I strongly believe in the preservation of our most basic human rights, not least that of Freedom of Speech.

"However with rights come responsibilities and we must work as a community to protect against the politics of hate and incitement.

"This weekend we mark Holocaust Memorial Day, a period of history which to all our shame saw hate destroy hope.

"We are therefore calling on you to ban Gabor Vona, the leader of the racist and anti-semitic extremist party Jobbik, from entering the UK as his politics of hate are simply not welcome here."

London Assembly member and former Labour MP Andrew Dismore has already written to Mrs May demanding that Mr Vona is banned from holding the event.

Mr Dismore, who as a Labour MP founded Holocaust Memorial Day, has called Jobbik "the most powerful outwardly fascist political party in Europe".

Mr Vona has previously denied claims he is meeting members of Greece's Golden Dawn party - who have openly expressed admiration for Adolf Hitler - and the BNP on Sunday.

His spokeswoman said that he is hosting a forum for Hungarian citizens ahead of a forthcoming election.

She said that the claims were "false", adding: "He has no intention of meeting anyone from Golden Dawn or the British National Party.

"This is a forum for Hungarian citizens. This is not to do with anyone else.

"There are lots of Hungarians living in London and the election is coming up in Hungary."

Earlier this month Mr Griffin told reporters that the BNP was likely to forge an alliance with Jobbik and Golden Dawn after the European Parliament elections in May.

Mr Griffin travelled to Athens to support Golden Dawn, which has seen a surge in popularity during the country's financial crisis, following accusations it is a criminal organisation.

A Home Office spokesman said: "We do not comment on individual cases or if someone is under consideration for exclusion."