Vegans reading this might not want to continue.
I just found a rat in the van. I think it came in under the sink. I could hear nibbling and alerted the pest control officer (Lurcher). He confirmed my suspicions.
I then had to remove a small chest of drawers. I took out fitted drawers and looked about, no sign and even thought it was under the sink.
Then the lurcher struck. There was squeaking, which alerted the senior pest controller (Jack Russell) who shoved the Lurcher out of the way and finished the job.
It had to be done.