Tennant made property unfit

Good afternoon
My tenant should of left my property on 4th April 2020 but refused. Due to the corona virus I was unable to get bailiffs .
Now he has flooded the property and made it unfit. He has also left leaving his clothes etc but not much furniture as it’s a furnished property.
Where do I stand?
Many thanks

And if he views this he can now sue you, and possibly Openrent for defamation.

we need names . Good man