A repeated noise above a bedroom can be unsettling, especially when the source is out of sight. The first useful step is a simple record. At a Gordon Hill address, note the room, approximate time, duration and whether anyone else heard the same thing. Keep that account separate from visible evidence such as damage or droppings. The two may be connected, but the inspection should test that possibility rather than begin with it as an established fact.
Concealed areas introduce practical limits. A loft hatch may be reachable while the space beyond it is unsafe to enter; a pipe boxing may be visible but require permission to open. Describe those features before booking and do not damage the building to collect more evidence. The technician can explain what can be assessed through available access and what remains uncertain. If another trade is needed to provide safe access or investigate a building defect, that should form a defined next step.
An effective response can include deciding that more evidence is needed before treatment. Ask which observations support the identification, what accessible areas were checked and how any monitoring will be reviewed. Where activity is confirmed, discuss the relationship between control and repairs so work happens in a sensible order. You should leave the conversation knowing what to record next, whom to contact about a change and which part of the original concern has or has not been explained.