I have been lucky enough never to have problems with tenants - until last year. I found out that my tenant was subletting to one of his mates... I couldn't believe the cheek of it! I suppose it was my own fault in a way for not having a Flat Share Agreement. Thanks to your expertise if it happens again I can use legal action.
My tenants at the moment are lovely people but they do like their TV and stereo to be played at ridiculous levels. Now that I have a proper Agreement, conducted by yourselves, I have the authority to do something about it... and I am sure the neighbours will appreciate it.