UK Lawyers for Israel (UKLFI), a voluntary group, has also written to the UK Statistics Authority about Hamas casualty figures.
In his response to UKLFI, Sir Robert said he “urged ministers, shadow ministers and other parliamentarians to give the source of any numbers they quote”.
Sir Michael told The Telegraph: “This intervention from the UK Statistics Authority is a timely reminder for the media, all parliamentarians, and indeed everyone, that Hamas is a vicious terrorist organisation which carried out the worst massacre of Jews since 1945.
“Extreme care must be taken by broadcasters and those in public life when quoting Hamas figures. Eminent statisticians worldwide have made it clear the figures are not reliable.
“It is essential that trusted sources here in the UK do everything they can to avoid carelessly disseminating Hamas propaganda as if it were the gospel truth.”
Mr Percy said: “For months, politicians, the media and others have blindly repeated casualty figures provided by a terrorist organisation with not only a history of rape and murder, but of open manipulation of statistics.
“I am therefore pleased that the Statistics Authority has rebuked those who repeat these figures without any reference to their very questionable source or without any apparent appreciation that they may be less than accurate and being used to support a biased political narrative.
“As in all conflicts, civilians are dying in this war, and every innocent death is a tragedy, but the repeating of highly questionable figures from a murderous terrorist death cult is directly fueling hate on our streets, particularly towards the British Jewish community.
“Politicians, the media and others should be more careful when parroting ‘facts’ from Hamas.”
