The Security Service, often known as MI5, is the UK's national security intelligence agency.

Since 1909 it has been responsible for countering covertly organised threats to national security. MI5 also provides security advice to a range of other organisations, helping them reduce their vulnerability to the threats.

MI5’s headquarters are at Thames House in London but it also has eight regional offices around the UK plus a Northern Ireland headquarters. The Service is organised into seven branches, each with specific areas of responsibility, which work to counter a range of threats including terrorism, espionage and the proliferation of weapons of mass destruction.

Apple

53

55

Deutsche Bank