Tenant Abandoned Property

Hi,

I have a tenant in a HMO property who has seemingly abandoned the property. He stopped paying rent a few months ago and I can see from the security cameras and digital lock that he hasn't accessed the property for a few months as well. Any attempt to contact the tenant to request either rent or keys is ignored. He still has some belongings in his room and in the kitchen. I have served a Section 21 notice and am just waiting for the court to issue a possession order which is taking forever. Is there anything I'm allowed to do if I can prove that he doesn't live here or do I just have to continue waiting for a possession order?

Any advice is appreciated.

Thanks