More on the Tzipi Livni London trip cancellation

This from Al-Jazeera:

UK court 'issued warrant for Livni'
A British court reportedly issued an arrest warrant for Israel's former foreign minister on charges relating to Israel's 22-day war on Gaza, before apparently withdrawing it after it was found she was not in the country. Tzipi Livni, the leader of the opposition Kadima party, had been expected to travel to London this week for an event organised by the Jewish National Fund, followed by meetings with British government officials.

Israeli media reported on Monday that Livni had called off the trip fearing that she would be arrested after a pro-Palestinian group won a warrant for her arrest. But Livni's office said in a statement after the reports that she had declined a request to attend the event in London due to a scheduling conflict and not because of fears of being arrested.

'Threat of prosecution'

The British foreign office issued a statement on Monday saying it was looking into the incident and its possible effect on the peace process.

"The UK is determined to do all it can to promote peace in the Middle East and to be a strategic partner of Israel," it said. "To do this, Israel's leaders need to be able to come to the UK for talks with the British government. We are looking urgently at the implications of this case."

Bill Bowring, a professor of law at the University of London, said the threat of prosecution is making international travel increasingly difficult for Israeli officials.

"This has happened before. It's under quite old legislation, under the fourth Geneva Convention of 1949," he told Al Jazeera. "Basically what it says is that if a person anywhere in the world commits grave breaches against civilians then that person should be arrested and prosecuted wherever they turn up in the world."