Hello Keith my name is ***** ***** I will help you with this.
What is it you want to achieve please?
You must by law give two months notice which takes effects from the next billing date.
This is called a section 21 notice. So you can give notice but it must be at least two months as she has an assured shorthold tenancy.
Can I clairfy anything for you about this today please?
yes I would if it is that important to you to have it right.