Do the neighbours have a right to know?

General Discussion

I have recently put a new tenant in my flat and am having nosy, whinging old neighbour issues.

It's a freehold property, in a block of five dwellings. Four are freehold and the fifth is (our) Leaseholder. Leaseholder chose not to purchase the Freehold when we all bought it some 15 (?) years ago. She lives in her leasehold flat, and it’s currently on the market. 

I'm getting many emails from her asking me who my tenant is? Who is your tenant? Almost hysterical that she doesn't know whose moved in? Who is it? Who is it, I don’t even know who is living there??!!!This kind of stuff. 

My previous tenant was quiet as a mouse and there 10+ years. I generally like my tenants, have a good relationship with them. I don't believe an owner occupier has any right to know their names or other details do they? I’m in no mind to tell this neighbour anything in fact, I believe I have a duty to protect the privacy of my tenant. 

I want to write back and say leave me alone and go and knock on the door and introduce yourself if you're so curious who lives there. 

Does anyone have experience of this, or thoughts? I’m dealing with an older and unreasonable person, who’s already got form within the block for complaining.