It won't be a "proper" terrorist if its Silkhouse Court, its just an office rental building (I used to work from there for about a year).
There were some interesting businesses there that could be the target of a religious fanatic.
But in all likely hood, its just someone that's lost the plot and at worst has a minor incendiary device.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates