From The Daily Express:

One plot foiled by MI5 involved a massive bomb blast at a ceremony in London on August 15 on the 70th anniversary of VJ Day. The Queen, Prince Charles and other senior members of the Royal Family were present.

Another foiled attack was aimed at Armed Forces Day in London in June.

Six UK terror plots have been thwarted in 12 months, Mr Cameron said. Amin, Khan and another Islamist fighter died when a precision guided missile fired by an RAF remote-controlled drone blasted their vehicle near the Islamic State stronghold of Raqqah in Syria on August 21.