I think you will end up an involuntary bailey which means you can't touch the belongings without following the correct process. I think you got to give the ex tenant a chance to collect by serving a torts notice. Basically you cant throw away the items anytime soon.

The previous comments about torts are correct. You have to give the ex-tenant an opportunity to collect their possessions, so you'll have to keep them somewhere. 28 days was the period that was recommended to me by my solicitor when I had to do this. You can just leave them in the room or move them somewhere else, but don't dispose of them early or your ex-tenant could take you to courf.

Bailiffs will establish whether the tenant is still in there and if not, will tell your locksmith to change the locks. As it’s a room there isn’t much else they need to do; they normally just check through the property that nobody is in there or for hazards but that’ll be really quick in this case as they only have to check the one room. You do need to arrange your own locksmith to attend the eviction and as another commenter has said, look in to serving a torts notice about the tenant’s belongings.

Best to change locks for all doors your ex-tenant had keys for