The Foreign and Commonwealth Office made no representations to the Israeli authorities on this issue. Aviation security is a matter for the Department for Transport and policing at Heathrow airport is a matter for the Metropolitan Police and the Home Office.
The Foreign and Commonwealth Office has not sought assurances from the Government of Israel regarding air marshals. Aviation security is a matter for the Department for Transport and policing at Heathrow airport is a matter for the Metropolitan Police and the Home Office.