Complex sentence: Hyde dies fighting a tripod, he brings it down but the other Tripods kill him, while MI5 launch H-142: a hybrid bacterium, made up of anthrax and streptococcus.
Split into simpler sentences: Hyde dies fighting a tripod, allowing time for MI5 to launch H-142. MI5 then launches H-142: a hybrid bacterium, made up of anthrax and streptococcus.