A diplomatic spat has broken out between the United Kingdom and Israel over an arrest warrant issued against former Israeli foreign minister Tzipi Livni as she prepared for a trip to London, the Times reveals. “The warrant sought to question Ms Livni over her role in last winter’s Israeli offensive in Gaza, over which both sides have been accused of war crimes”, the London daily reports. Israel’s government is said to be “furious” over the affair and has issued “an angry warning today that its ties with Britain were in jeopardy”. Speaking at a security conference, Ms Livni, who subsequently cancelled her trip to meet a Jewish group in London, has declared she is “proud” of her role in Operation Cast Lead – an Israeli offensive against Gaza militants firing rockets into Israel, in which some 1,400 Palestinians and 13 Israelis died during a three-week war.