Theresa May was on Sunday facing mounting pressure to launch a full investigation into an Israeli diplomat caught plotting to "take down" a British minister for his opposition the Israeli occupation of Palestinian territories.
The opposition Labour and the Scottish National parties both called on the British prime minister to investigate Shai Masot, who caught by an undercover reporter discussing with a British civil servant how to discredit deputy foreign minister Alan Duncan.
The Israeli embassy on Saturday said Masot would be removed from his "junior" position and apologised for his actions, while Britain's foreign office said: "The UK has a strong relationship with Israel and we consider the matter closed."
However, Emily Thornberry, the Labour shadow foreign minister, called for the removal of Masot from the UK and a full inquiry into the affair, which she described as a "national security issue". The call was echoed by the Scottish National party, while dissent began to grow within May's Conservative party over the foreign office statement.
Thornberry said: "The exposure of an Israeli embassy official discussing how to bring down or discredit a government minister and other MPs because of their views on the Middle East is extremely disturbing," she said.