Sir Ken McCallum said the past year has seen increased Iranian action against Jewish sites, and a move towards harder targets such as military bases. The head of MI5 says Iran is trying to hit military sites in the U.K. Key points and original sources are listed below.

• Sir Ken McCallum said the past year has seen increased Iranian action against Jewish sites, and a move towards harder targets such as military bases.S1

• The head of MI5 says Iran is trying to hit military sites in the U.K. and the suspected plot to attack a U.S.-run military air base in September is not unique.S2