trespasser

Network Rail also investigated after receiving a report of trespassers, but did not find anything untoward, the PA news agency reported.

More than half of the calls that the unarmed responders handle involve some type of disturbance, with reports of a prowler or trespasser as the next most common category.

It has been sitting empty for about 18 months, a sign on the gate telling trespassers to keep out.

However, the military is allowed to patrol its own bases and arrest trespassers through what is known as the "military purpose doctrine".

She said that prompted her to install the iron fence with razor wire but that it was eventually damaged by the trespassers.