Iain McNicol, the Labour Party general secretary, has laid a wreath at the Yad Vashem Holocaust memorial in Jerusalem on behalf of the party.
Mr McNicol travelled to Israel this week on a three-day visit organised by Labour Friends of Israel.
The trip was arranged after Isaac Herzog, Israeli Labour Party chairman, invited Jeremy Corbyn, Labour leader in the UK, to visit Yad Vashem, and Mr Corbyn turned down the offer. He said he was too busy to go.
Tom Watson, Mr Corbyn’s deputy leader, went to Jerusalem last November and also laid a wreath at the memorial.