Mark Regev, Israel's UK ambassador, was greeted by protesters - and supporters - when he arrived to speak at a London university on Thursday evening.
An estimated 300 Pro-Palestinian activists gathered outside the School of Oriental and African Studies and chanted slogans calling Israel an apartheid state and demanding a "free Palestine" .
Protesters carried Palestinian flags and banners, one of which read "Get lost, Mark 'Freiburg' Regev," a reference to the ambassador's family name before they had moved to Israel.
One speaker addressing the crowd described Mr Regev as "a war criminal".