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… describe the terrorist use (or threatened use) of Chemical, Biological, Radiological or Nuclear material as a weapon, … describe the terrorist use (or threatened use) of Chemical, Biological, Radiological or Nuclear material as a weapon, … materials including corrosive substances, poisons, toxins, biological organisms and radioactive sources.  These …
Terrorists can use fire in attacks in a number of different ways. ProtectUK gives an insight into Terrorist use of Fire in Attacks and Fire as a Weapon (FAW).
A drone is the common term used to describe an un-manned, remotely-controlled or autonomous vehicle. This article is an analytical look into the threat the UK faces from drones.