Thank you. It is essential that you all stick together on this. Whilst the landlady might not want to lose this person’s rent, you will almost certainly not want to lose the rent of the rest of you. From a practical point of view if all three of you said that unless she left you were going to give notice to quit, she may think twice about getting rid of the abusive tenant. If the malicious tenant is spreading untrue rumours, that is harassment and is a matter for the police with a view to getting her warned under the Protection from Harassment Act. The more review make the complaint to the police, the better.
You can also apply to court for a civil injunction to get her to stop spreading these rumours and making allegations and solicitors letter threatening the court application may get it. Although to be honest, if the culprit is an alcoholic, it is unlikely to make much difference.
As it is, the landlady is in breach of covenant for quiet enjoyment by simply allowing the other tenant to cause nuisance. If the landlady won’t do anything about it when you are faced with a court application to make her do something about it. You are presumably all on Assured Short hold Tenancies and there is a risk that she may not like the threat of being sued all over this obstructive neighbour and she may get rid of the neighbour. On the other hand, for whatever reason (sometimes people are not logical) she may decide to give the other tenant’s notice.
Unfortunately, there is not a quick and easy solution without involving the police or threatening court or ultimately taking the matter to court.
Can I clarify anything for you?
Please do not forget to rate the service positive. It’s an important part of the process whereby experts get paid.