Me and my housemate let's call her Laura live in a 3 bedroom shared house with another person who I'll call Sarah. After a few problems Sarah moved out 6 months ago to live with her boyfriend, but they've recently broken up and she's moved back.
Laura and I both have uni exams and work to get up for and Laura is also pregnant. Sarah has started coming in at 1-2am and bringing friends round where they play music and are generally loud until they leave at around 5am.
Since she's been back Sarah has also started smoking weed in the house, and we've had people knocking on the door in the early hours making drop offs. The whole of the upstairs is starting to stink due to the smoking in the house.
We have tried to talk to Sarah, but she's ignored us so far and is someone who really isn't approachable. Our tenancy ends in August but Laura and I are moving out in a couple of weeks due to the problems.
Would it be unreasonable for us to contact our letting agents about Sarah when we've left? We're concerned about damage being done to the property and us being blamed for the smell of smoke and not getting our deposits back.