A spokesman for DSEI said:
We recognise and respect the right to protest and we plan for these scenarios in advance....While the police monitor and manage protests, it is DSEI's function to go ahead with organising and carrying out a highly regulated event, complying with international laws and treaties.
We are delighted that this year's event encompasses a full range of defence and security equipment, including that which is designed to tackle humanitarian disasters, address food shortages and mass displacement of people, counter terrorism measures and cyber security.
More top news
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.
Oliver Dearlove died 24 hours after receiving the fatal blow outside Morden's wine bar in Blackheath last summer.