I have a HMO with 5 students on separate tenancy contracts. Tenant 3 has been complaining to me that tenant 5’s boyfriend has been living at the property. Tenant 3 says he is messy, noisy, leaves the front door unlocked, sets off the fire alarm, etc… and would like him to spend less time at the property. I have encourage tenant 3 to speak to tenant 5 but she doesn’t want to cause friction/is apprehensive of confrontation. I have spoken to tenant 5 and she denies that her boyfriend has moved in but admitted he did stay in the week (she goes to his at the weekend). I’ve raised the points that upset the other tenant but from her reaction I’m not expecting much improvement. Therefore what are the occupancy terms of the tenancy contract? 40 says “The tenant shall not allow any person to occupy the property (of whatever age) other than those named as tenants or permitted occupiers in this agreement.” Does that mean the tenants are not allowed any overnight visitors? What about the shared facilities; what can I do about guests making a mess/noise?