Earlier, several senior Israeli military commanders, including Halutz, were forced to cancel visits to the UK for fear of being arrested.
Under pressure from Israel, Britain altered its rules in 2011, giving the head of the state prosecution service the power to overrule a court decision to issue an arrest warrant for a visiting official.
Weill said it would be difficult to get either the ICC or countries with universal jurisdiction laws to investigate Israel because political considerations tended to overshadow legal ones.
"It is hard to persuade Western countries that a state like Israel, which is seen as a similar kind of democracy, has a failing legal system, incapable of conducting proper investigations."
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