Travelers who have visited Israel or the Palestinian territories and observed potential war crimes or terror acts are urged to come forward. Notices in Arabic, Hebrew, English are displayed in airports including Heathrow.

According to Palestinian health officials, casualties in Gaza since October 7 amount to 22,185 dead and 57,000 injured, with extensive harm to civilian infrastructure from Israeli bombings.

Supporting the ICC's 2019 inquiry as the UK's official authority on war crimes, a Met representative emphasized the unit's duty and the role of the posters in fulfilling their obligations under the 1998 Rome Statute.

ICC prosecutor Karim A Khan has reminded Israel of its legal responsibilities to adhere to the laws of armed conflict, underscoring the importance of principles like distinction and proportionality, and clarifying that combatants must prove loss of protection for any targeted sites.

In contrast, former PM Boris Johnson and other critics view the Met's actions as an undesirable political move, suggesting the force should focus on domestic issues such as knife crime in London.

Gideon Falter of the Campaign Against Anti-Semitism also deems the campaign as bizarre, especially given the lack of action against certain protesters promoting extreme views in London.