Did he find her 'hard to live with' before or after he got the tramp's name tattooed tramp stamped on his wedding finger?
What a shit 5* break that must have been for the other guests 
It's all lies, honey. She's as bigger lush as he is, they've had a drink fuelled argument, and he'll be back with her next week.
In the meantime, he thought he'd crash at your place and worm some dosh out of you with a view to turning up on her doorstep bearing gifts.
Time to deliver the coup de grace. Call the police on the non-emergency number and refer to your earlier conversation, say you managed to prevent him coming into your house but that he's texted to say he's parked outside in his van (give the reg no.of the vehicle) and isn't going anywhere.
Say that you're fearful that he might attempt to enter your home later tonight after you've gone to bed, and would they please come round to move him on and tell him not bother you again with texts/phone calls/visits.
If you don't you may find that, if she has genuinely gone to Ireland for a few days and not left her keys with him (sensibe woman), tonight's scenario will repeat itself and ruin your weeked.
Given that already he's ruined more than a few weeks of your life, enough is enough don't you think?
And aren't you glad you changed your locks! Well done you.