In pictures: Britain's worst terror attacks
The terrorist attack in Manchester that targeted children at a pop concert is just the latest in a list of atrocities to strike Britain over the years.
Police have said that 22 people have so far been killed as a result of a suicide bomber blowing himself up outside the Manchester Arena, shortly after singer Ariana Grande walked off stage.
MORE: Manchester Arena explosion: Eyewitnesses describe people lying on floor ‘covered in blood’
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Already it is being labelled as one of the worst acts of terrorism that Britain has suffered.
The UK has suffered bombings and killings by terrorists for decades – here are just some of the worst that have taken place…