The premisesDescribe the route to the affected space
For West Ealing in W13, include any flat number or separate entrance needed to reach the concern. If the signs are in storage rather than a main room, explain that too. These details organise attendance and access without implying that adjacent space is affected or automatically included.
What you have noticedGive the latest report its own detail
The most recent sighting may be more useful than a general history of occasional problems. Tell us what appeared, where and whether damage accompanied it. We consider previous activity too, but avoid assuming that a new insect or sign has the same explanation as something seen in the past.