The premisesAsk which conditions are relevant here
Storage, waste and building gaps can matter, but advice should relate to the findings rather than a standard accusation about cleanliness. For Woodford enquiries across IG8 and E18, explain the precise address and affected area. We then consider the conditions there without making assumptions about the surrounding properties.
What you have noticedSeparate fresh activity from what remains behind
Old holes or marks can remain long after they were made. Tell us which signs are new, which have changed and which you have only just discovered. Insect samples in photographs, repeated sightings and fresh packaging damage can add useful context without requiring you to disturb a suspected harbourage.