Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
Are there any children involved?
How long have you been trying to separate?
Did you live together prior to the marriage?
Are you willing to start divorce proceedings
For clarity - have you actually issued divorce proceedings at all?
That is your starting point.
You need to issue divorce proceedings based on her Unreasonable Behaviour as soon as possible
the process is described here
Once you have the Decree Absolute your ex will have no right to remain in the property and you can give her 28 days written notice to leave
I hope that this is of assistance - please ask if you need further details