In a Bristol Beaufighter of RAF Coastal Command, Wing Cdr Gatward and his crew flew over the main streets of the capital at the level of third-floor windows.

BBC: Daring World War II pilot Ken Gatward's medals auctioned

Two packets were then seen dropping from either wing of the plane following his command.

CNN: Spain 'al Qaeda cell' may have targeted Gibraltar

Senior officers may now be considering bringing Trident into the Homicide and Serious Crime Command (HSCC) wing of the Met, which is home to 24 murder investigation teams.

BBC: Operation Trident poster