UK Landlord Forum / Life

Hi All,
I have searched this most excellent forum but cannot find my situation in any other posts.
I have great tenants who have been there for over 10 years, I am happy for them to stay.
However they have allowed their nightmare son to move in without my permission, I do not want him in the house and I have told them so.
They are still letting him stay with the usual crap sob story about his disastrous life.
It is a small village and the son is well known for being a nightmare, he will cause me huge problems if he is allowed to stay and become a tenant.
At this stage I want to write to the tenants and formally state he has to leave to hopefully nudge them to get him to leave, or I will have to consider ending their tenancy.
Does anyone have any suggestions how I do this and is there anything specific to put in the letter?
Cheers

I think I would issue s21,without any explanation.You can cancel it if they get the message and chuck him out,or carry on to evict if he stays.It will let them know how strongly you feel about his presence.

Yeah, be strong immediately. Sob story= time wasted/money lost. Don't get tricked by that crap.

What does your tenancy agreement say about people who aren't tenants staying in the property?

The son can't become a tenant without your agreement, or unless the parents both die.

If you're serving a section 21 notice, don't send any letter or explain why, just serve notice, having checked that you have everything in place to be able to do that.