Laws have changed a lot since I last had a lodger in the early 90’s a similar situation a friend lodged at my house weeks kept going by without any forthcoming payment so I chucked him out, packed all his stuff away neatly in boxes and an old suitcase and I dropped them off at his workplace 😆
Throw him out and change the locks his word against yours.

Throw him out on his ear tonight, change the locks & deny any knowledge of him ever being a lodger

Hang on, hang on, have a laugh first

You’re a complete mug if you give him a penny

Where are you located?

superglue his eyes shut while he sleeps and when you kindly offer to take him to the hospital, drop him and his stuff off in a field by a motorway. Then move house and change your name , just in case…

Surely he now owes you the original amount minus the week’s rent?

So just press the fact that he’s the one in debt not you.

Collect all his goods up, and put in suitable storage, and charge him the amount he owes you to get it back.

Why hasn’t he paid you rent? Can he pay you rent in the future?